Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f176bb75394d1ba…

MALICIOUS

PDF

99.0 KB Created: 2021-07-12 22:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 52041f026bff74e8fcde70a8fc52d0f2 SHA-1: d8adb5d49fcd410360314a084842662ae1128485 SHA-256: 2f176bb75394d1bae2074fc47c4f5ed45e54712ba6ff969dda72795eafdca090
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, likely intended to lure users into downloading further malware or engaging in phishing activities. No scripts were extracted, but the presence of multiple compromised domains and link farm characteristics strongly indicates a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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
  • 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.
  • 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://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160969f9c55225---40910616339.pdf In PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/3dd446f654d38797697bbac20406467a/33994939621.pdfIn PDF document text
    • https://bataretak.com/img/files/file/vatevivolu.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/63246116015.pdfIn PDF document text
    • http://bhsclassof70.com/clients/a/ac/acf0241a72c9eb28a719a759cf8a4748/File/mozipiluzefuwuvinirakaje.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1609448f18a306---1542256776.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/l4i5fb9v3u6di4r3lf438hjttl/xisizadovaweteger.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ba22b558f---31793191533.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/30293468508.pdfIn PDF document text
    • http://fotografoenricogiampieri.it/userfiles/files/befojur.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/8iec27qr9sj2s89nk9higqtmb0/47866944449.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/41670595752.pdfIn PDF document text
    • http://rallyteamwalraven.nl/file/1039407336.pdfIn PDF document text
    • https://marblo.com/app/webroot/img/files/53713768224.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/fukazexo.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/mujuripatizuvenino.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/49338183176.pdfIn PDF document text
    • http://kajsanordstrom.com/userfiles/files/zopazi.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/rifizo.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/satajedulil.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/96758453554.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/7ea43082b67dd0ebc2c43bc8937bf1dc/9593203384.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/33d5906b77a126939c926dbfcb88644e/jibiroguxafusi.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080899c5faa6---dolamilukodaki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=writing+the+winning+thesis+or+dissertation+pdfPDF 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_off0001215b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1215B 10808 bytes
SHA-256: da8b9d535a6e0b2191296a17f3054f484ff23831fb764687a5f33f4315b520fe
font_01_sfnt_off00013a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A0A 16964 bytes
SHA-256: 165d0816d738b7a8f06e3afe861223d4ff62169d97bef6af2ed20e2f680ccd37
font_02_sfnt_off0001666a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1666A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1