Malicious PDF — malware analysis report

Static analysis result for SHA-256 e069c4d5c3022495…

MALICIOUS

PDF

91.6 KB Created: 2021-07-18 04:01:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b002101e86fbc37e46d57312717640b8 SHA-1: eb7bb65aaec9827af4648eee6876a68d7fb5b638 SHA-256: e069c4d5c3022495993091c2357fe504d2266dda5dae86c9f47d8371428ecfe0
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or are hosted on disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://marathon-gexin.com/Uploadfiles/files/vupodewijijavo.pdf In PDF document text
    • http://bkdesign.ee/userfiles/file/wurojew.pdfIn PDF document text
    • http://sparkpro.lv/content/file/26040993267.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/f4non7v07sumkt1fc841daqibm/rulomaxubo.pdfIn PDF document text
    • http://quaretti.it/userfiles/files/35709878381.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071638dc6830---9288792862.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/78408446186.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ededf80eb1---zotikamafojorovipofis.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/96633986831.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a98f7d3cfeb---55441881640.pdfIn PDF document text
    • http://xdata.pl/app/webroot/img/ckf/files/87460343188.pdfIn PDF document text
    • http://stonebreaker.at/pilerora.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/kebomatusofijebiwi.pdfIn PDF document text
    • http://eva.am/files/2ca27b83c1c8bf10.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/71197087392.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/giwagux.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210603203834.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a684418b975---53406415392.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/tosojon.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be08e999ad2---2531723005.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5b9bab1f3---52504175152.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/boxifijaluxarugumude.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=unix+interview+question+and+answersPDF 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_off000102cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CC 17360 bytes
SHA-256: 17b1d249f93667eb2f97ce93c4c567938c824ed0b70758b60109f3cbfebdbe5a
font_01_sfnt_off0001303f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1303F 10700 bytes
SHA-256: 4a5ff1662c757406f7cb4bd9f9b1fba5c06f512857f2b1387acac512f580101f
font_02_sfnt_off000148d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1