Malicious PDF — malware analysis report

Static analysis result for SHA-256 86bdb02d85eee32e…

MALICIOUS

PDF

96.9 KB Created: 2021-02-21 10:59:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 44090a7087175f18136812ee612a6906 SHA-1: 4898c3e412eb27c8ed4c4b36213370293070f9ee SHA-256: 86bdb02d85eee32eebf80fdbf47a859f7f07dfc19379993ed6177a5cb0fdc42d
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM', suggesting a tactic to drive traffic to potentially malicious or phishing websites. No scripts were extracted, but the presence of embedded URLs and the link farm heuristic strongly suggest a phishing or SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://jacksth.ru/strik?utm_term=what+is+or+gate+in+digital+logic PDF link annotation
    • https://gijojipile.weebly.com/uploads/1/3/1/3/131381352/74330138c0e.pdfIn PDF document text
    • https://kibanelamuvudu.weebly.com/uploads/1/3/0/9/130969844/dd04e1c4.pdfIn PDF document text
    • https://jurefuzosapob.weebly.com/uploads/1/3/4/9/134901670/dedebuk.pdfIn PDF document text
    • https://cdn.sqhk.co/zebapomiz/1DjjUJA/age_of_war_2_similar_games.pdfIn PDF document text
    • http://good-production20.site/xunukisezonuxov82rm.pdfIn PDF document text
    • https://zofazozudu.weebly.com/uploads/1/3/0/7/130739697/463c040ae511a.pdfIn PDF document text
    • https://kagesurofuzesik.weebly.com/uploads/1/3/5/3/135303772/b24f65a468013.pdfIn PDF document text
    • https://gadiziwit.weebly.com/uploads/1/3/1/4/131406086/6216849.pdfIn PDF document text
    • https://kovorugoza.weebly.com/uploads/1/3/1/3/131383314/mikanobo-xanazuz-vekutowufo-biwuguvabipe.pdfIn PDF document text
    • https://bojufare.weebly.com/uploads/1/3/1/0/131070992/7bc902b56a.pdfIn PDF document text
    • https://cdn.sqhk.co/zixagiko/gjbybjb/nolokelevegonesegojako.pdfIn PDF document text
    • http://robertferrell.net/72167089232nuemu.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/vuliwisuwig/property_reservation_form_template_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/67279425775.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/bodyboss_method_nutrition_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/mubaxawolilalitu.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_off000125cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125CB 5216 bytes
SHA-256: 5df7f788f958eae800f7ac61dc95e8dd9a77ac15201eafddd8e82d095f969bc9
font_01_sfnt_off0001378e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1378E 12228 bytes
SHA-256: a2fc3596c53ebafc18720f13ae75e47ec1a336fb842fa95ade0e8ee0074fca25
font_02_sfnt_off00015fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FA1 16640 bytes
SHA-256: c215a042917a038782bb81186d1a3d30e750fd96b155c756c4c1d2140ce8b890

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