Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ab6f6094d92499c…

MALICIOUS

PDF

79.5 KB Created: 2021-03-27 15:12:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bae38ce7ea35d41bdb297bb3f680bc24 SHA-1: 1a46da4db41102575230cfb27b602348c96f152c SHA-256: 3ab6f6094d92499c18fd3bf55b47e36e56bc0b3caa92c915782f9d8029227cfe
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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.
  • 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://kuzutuzo.ru/strik?utm_term=us+army+unit+flags+for+sale PDF link annotation
    • http://tejasatobes.medianewsonline.com/10442317556.pdfIn PDF document text
    • http://zumbayuliya.online/tanamogsoe1o.pdfIn PDF document text
    • https://kubamugikogili.weebly.com/uploads/1/3/4/5/134508843/4630376.pdfIn PDF document text
    • http://xulazawelinuze.scienceontheweb.net/akbarnama_book_in_english_free_download.pdfIn PDF document text
    • https://rirudelibuwa.weebly.com/uploads/1/3/1/6/131606594/b356300765.pdfIn PDF document text
    • http://esclub.info/3325221586zwxfv.pdfIn PDF document text
    • https://degijidugaf.weebly.com/uploads/1/3/4/8/134886203/8ef662a32d992aa.pdfIn PDF document text
    • https://fetatoba.weebly.com/uploads/1/3/4/6/134689412/1963132.pdfIn PDF document text
    • http://atomyimperial.ru/sarosupllpzd.pdfIn PDF document text
    • http://kazexezawulozij.mypressonline.com/bonita_bpm_tutorial.pdfIn PDF document text
    • http://agent-spv.space/sat_2_biology_practice_testrdg5n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/satuja/luniki.pdfIn PDF document text
    • http://rususekobijo.myartsonline.com/all_my_sons_act_1_summary_sparknotes.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/advanced_level_physics_syllabus_tanzania.pdfIn PDF document text
    • http://bovaxibeloxev.rf.gd/26082212082.pdfIn PDF document text
    • http://tipopetudigovib.epizy.com/business_closure_letter_free_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/ma_vehicle_crash_report_form.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/74568031133.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/29703128373.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/why_is_my_wallpaper_steamer_not_working.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_off0000e254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE254 5180 bytes
SHA-256: c97a889f98d4cdb7a14eaccd47af4ee15119e5339820803943bf4b7a06431a53
font_01_sfnt_off0000f3ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EC 11520 bytes
SHA-256: bdefe39085673f776b833fee21e0b0d24278e4d57c3c717fb9aed720cc90a249
font_02_sfnt_off00011b3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3B 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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