Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab65e4c4d4da144…

MALICIOUS

PDF

81.8 KB Created: 2021-03-20 23:31:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 3906396e4986efc7994de9654e1c3bb5 SHA-1: 50c3bc9c0485c946246cd1e32303c89869ae5d21 SHA-256: 6ab65e4c4d4da14444122a533fbf1f8d35ea1618091263997cc85430e36c92d8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or content-luring scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

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 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://nipisod.ru/wix?keyword=the+road+summary+pages+100-150 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385011/normal_60462e0c145d2.pdfIn PDF document text
    • https://cdn.sqhk.co/petawelesup/ihsjdJB/hitman_sniper_assassin_mastery.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381547/normal_5fd0da3d73355.pdfIn PDF document text
    • http://myyshooop227.site/vitafivuwastq83u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416140/normal_6005c017bba8d.pdfIn PDF document text
    • https://cdn.sqhk.co/gegojagakexu/Vjfidig/help_annie_game_walkthrough.pdfIn PDF document text
    • http://jexafagod.22web.org/sokakagaxosafijejogag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379618/normal_6027379b6c253.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492918/normal_6025be07910a3.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/WQic4gj/12410975050.pdfIn PDF document text
    • http://sputnews.com/kuxenedolawudojawaxum14ad.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/ae22ljj/7255925387.pdfIn PDF document text
    • https://cdn.sqhk.co/vugomupuzisa/ctScahd/vizemolegenuvamul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471083/normal_601d14c826cdc.pdfIn PDF document text
    • http://teaitalis.space/vobebojemxxyo.pdfIn PDF document text
    • https://cdn.sqhk.co/segenapiza/efaigig/consultar_mi_factura_at_t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zowomazo.epizy.com/zelibulijamurivigonoj.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f31d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31D 5388 bytes
SHA-256: 1b17fa4409de121cddc8ba3213b61c168d18397e2945218044030a2dbc12af0c
font_01_sfnt_off0001057d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1057D 11336 bytes
SHA-256: 374c7ad170e2489f91319d66c1498d51e53de7e0dad5204fa42eb66083a4b532
font_02_sfnt_off00012bad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BAD 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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