Malicious PDF — malware analysis report

Static analysis result for SHA-256 edc4da319139ef9b…

MALICIOUS

PDF

81.3 KB Created: 2021-01-29 20:06:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b147e318d6b6f1ac0bbc12092bc86ba7 SHA-1: 5f0e31b3bdce7dfd5cde853e0068c59266eecad8 SHA-256: edc4da319139ef9b4439cbb3627e7fc716aecf339ccd45b108fef4c005c58dc2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to other PDF files, indicating a link farm designed to host malicious content. The presence of a download button lure and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest a phishing or malware distribution campaign. The embedded URL 'https://trafffe.ru/wb?keyword=ncert%2010%20science%20book%20solutions%20notes%20cbse%20guide' likely serves as a deceptive entry point to this network.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffe.ru/wb?keyword=ncert%2010%20science%20book%20solutions%20notes%20cbse%20guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4380219/normal_5ffb2fb54eed5.pdfIn PDF document text
    • http://gazzsheff.xyz/rodemitotubifobirulozoheyku.pdfIn PDF document text
    • http://kidepokapila.22web.org/kibanitibu.pdfIn PDF document text
    • http://zesisoxesevi.22web.org/61783336308.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471095/normal_5ff05d43bb225.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383921/normal_60038abe28913.pdfIn PDF document text
    • http://adyga.site/vr_wing_chun_trainerqh82j.pdfIn PDF document text
    • https://jabuvevakeg.weebly.com/uploads/1/3/4/6/134685488/f4994c13e53a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475209/normal_60090af8b35b4.pdfIn PDF document text
    • https://wosowabo.weebly.com/uploads/1/3/4/3/134340570/8d069748.pdfIn PDF document text
    • https://cdn.sqhk.co/nivatasob/hhMghje/alone_status_tamil.pdfIn PDF document text
    • https://pebuxunuvir.weebly.com/uploads/1/3/1/4/131483235/lifuwomumu_lapur_jipuz.pdfIn PDF document text
    • https://cdn.sqhk.co/gitaligido/jRfheUk/mujovizijatawej.pdfIn PDF document text
    • https://cdn.sqhk.co/pemoxeriko/ZSWTTic/download_game_lords_castle_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zopimoforaja/hmsuihc/xapegoratinoxakaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xekababemaxukop.rf.gd/81744320086.pdfIn PDF document text
    • http://lafeseg.rf.gd/93647679648.pdfIn PDF document text
    • http://disetorabagubed.epizy.com/selamaxeretowi.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn 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_off0000eb2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2D 5264 bytes
SHA-256: f6c2c5fdeaefda5255593046ee45fe8f1a8833ae227236b29ccb2110db753306
font_01_sfnt_off0000fd2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2E 10812 bytes
SHA-256: 6cf99022595ada17398ff6792d841c9a2996c461a26e36930097e005b67ca5b5
font_02_sfnt_off00012210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12210 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e

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