Malicious PDF — malware analysis report

Static analysis result for SHA-256 7341cc7317c650c6…

MALICIOUS

PDF

89.1 KB Created: 2021-07-19 13:11:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 521344650b853c7f7bc0f6dde99977fb SHA-1: aa9b0d106f4456a7f6465d88d488926e58c20d06 SHA-256: 7341cc7317c650c6c2ece983f66cf62a5c3f8d6c446e8aeb940fab9250b89e2b
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a social engineering attack. The document likely attempts to lure the user into executing a command by presenting a deceptive download button and instructing them to press Win+R or paste a command, a technique consistent with ClickFix attacks. Several URLs point to compromised CMS upload storage and disposable hosting, suggesting a distribution mechanism for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://traiteur-ribot.fr/userfiles/file/rodukofanapotufevub.pdf In PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b199188542---62969104482.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bbeddf9d0---nofowev.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608319b3e8789---33132708220.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/afd12f621623163a57d567b2ef3d4148/11478314260.pdfIn PDF document text
    • http://baudoinfamily.com/clients/f/fc/fc66627f90e8a365851b026dcf169025/File/jujumipu.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4c655e2d4---82874133666.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607da6b19c3be---75060904174.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1608238433918b---ferutijava.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/mapofujopamek.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/mokelarikabafutax.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080de81d03aa---wejotegodeziweje.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/01474143efef9c507a5efd03eb12c547/80722927692.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/74d6544790a44c0e5f6704b2e10e1ed6/27749113573.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/j8mc9897b8chbfrn3v9f8pqbkj/zajinosemejejopuresazoni.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9403cc8ace---supepazel.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd6ea14609a---34625760495.pdfIn PDF document text
    • http://simonide.org/userfiles/file/wepogufirarizuraxadum.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/sazafevewibodatozetobibo.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6ff9affa5---47789379370.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa0e232b48---mebisapakunepufofu.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/73056502205.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ed59076d9---52167186285.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b4cfa7de9f3---rupizenimawabavibugofane.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/25439ff3b895cd44e81818300ea0b465/77700245675.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=word+non+commercial+use+unlicensed+productPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF172 10768 bytes
SHA-256: 0c19f92d18a13a92efaedbef63dc380fbc66eda655f2d019b8421fc29705af2a
font_01_sfnt_off00010a34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A34 21368 bytes
SHA-256: fce49defd3c6e3889d3f68124198eecd693ed9aaf90c3cb4cdacc2e1d9c6b7cb
font_02_sfnt_off00013cb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CB4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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