Malicious PDF — malware analysis report

Static analysis result for SHA-256 781c15f0a243b088…

MALICIOUS

PDF

82.6 KB Created: 2021-09-14 04:05:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b7f5f41a5b2633bf77f4a437a423829d SHA-1: 55897ad649ca286acd32a238d7af41ba5af85cef SHA-256: 781c15f0a243b0886d221166f7d1b68f84a0f08b17a7aaf1ab3da90dcdb5099f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded links and a visual download button, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded links are commonly used to deliver malicious payloads or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f6ab0f12e7---24777572367.pdf In PDF document text
    • https://catbasailing.com/upload/fck/file/jadariganupefejex.pdfIn PDF document text
    • http://farmaciafoglia.eu/userfiles/files/nutowatoxidonexaji.pdfIn PDF document text
    • http://saltokisport.com/uploads/files/79141477812.pdfIn PDF document text
    • https://satellietgroep.nl/userfiles/files/vadimugonobiwab.pdfIn PDF document text
    • http://artetendasud.it/userfiles/files/derobipedugebo.pdfIn PDF document text
    • https://abisspaandboutique.com/nbloom/fckuploads/file/63577133105.pdfIn PDF document text
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xoxerej.pdfIn PDF document text
    • http://minhphucvietnam.com/uploads/userfiles/file/todutamivunekugipepurok.pdfIn PDF document text
    • http://iphonedown.com/ckfinder/userfiles/files/lexikunupisavakam.pdfIn PDF document text
    • https://consultemergingmarkets.cubsindia.com/files/tisegukimilavesefinamuj.pdfIn PDF document text
    • http://rybarict.cz/webpagebuilder/ckfinder/userfiles/files/52412253409.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/woleduj.pdfIn PDF document text
    • https://listapp.in/ci/userfiles/files/xitojanudamogigitabud.pdfIn PDF document text
    • http://studiosiriosrl.it/userfiles/files/merujezitezokakokumibo.pdfIn PDF document text
    • https://batdongsandothanh.vn/luutru/files/dafuson.pdfIn PDF document text
    • https://saigonservices.vn/images/uploads/files/tenoxanuvobadedukigud.pdfIn PDF document text
    • http://vibrobeton.by/pics/files/47680435394.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/a1535e44aaa0b422ba54dbdbe341dbd8/riwuguvizovasoraji.pdfIn PDF document text
    • http://sevoir.hu/uploads/file/zonego.pdfIn PDF document text
    • https://enilubricant.hoakhanh.vn/uploads/image/files/77348172069.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202109032231095497.pdfIn PDF document text
    • https://digireg.ch/upload/85400903409.pdfIn PDF document text
    • http://ace-pharm.com/upload/files/52706466684.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=trapped+movie+download+filmywapPDF 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_off0000de8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8A 18000 bytes
SHA-256: 074563794b20b4cb1851e31257775e5bd726de8cf4e744b93554856a5c771488
font_01_sfnt_off00010c32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12449 10620 bytes
SHA-256: dd4f1db24dc8d729a6088f540e38240c1dffcb61100f6d40d9c73aa252c3261d