Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9e26d22af4b31db…

MALICIOUS

PDF

80.8 KB Created: 2021-03-28 10:40:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: bad2c4354eed9c4bd3f0977ab19f82e2 SHA-1: 6f6ffbe433bedb7572b8871f74eac8b124630bdb SHA-256: d9e26d22af4b31db88f76ffc6b6fa5a8f2a0f45f2e919996e9eca13036036b0b
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The document body, though heavily obfuscated, appears to be a lure related to technical support queries. The presence of numerous external URLs and the PDF_SEO_LINK_FARM heuristic indicate a strong likelihood of redirection to phishing or malware sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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.
  • 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://zajinet.ru/strik?utm_term=how+do+i+reset+my+samsung+blu+ray+player+bd+p1600 PDF link annotation
    • https://zolalaroka.weebly.com/uploads/1/3/4/5/134591985/vikekoje-jikudopemuwi-pinorunegibopit-titup.pdfIn PDF document text
    • https://cdn.sqhk.co/bemaxopig/jitharH/33610889473.pdfIn PDF document text
    • https://cdn.sqhk.co/guvawatuzax/ia1ogfN/american_dad_apocalypse_soon_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/kepebeso/cShhMi9/fanodibotoferesujogafokep.pdfIn PDF document text
    • https://cdn.sqhk.co/zopimoforaja/ejghhgc/walking_dead_movie_trailer_2019.pdfIn PDF document text
    • https://ligumanu.weebly.com/uploads/1/3/0/7/130775644/3488753.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/SgcHHPG/15041022136.pdfIn PDF document text
    • https://ronukava.weebly.com/uploads/1/3/4/8/134885886/4193919.pdfIn PDF document text
    • https://gilurumujeluzem.weebly.com/uploads/1/3/1/8/131857598/xikolosadifepozu.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/chmN5hc/52216201753.pdfIn PDF document text
    • https://cdn.sqhk.co/tumupowe/ji1hc9B/61526510981.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzetuzame/pjdslhd/zaxekagonifinapoloxipom.pdfIn PDF document text
    • https://defelewag.weebly.com/uploads/1/3/2/7/132741475/difefuworis-kozenowaj-dizefa.pdfIn PDF document text
    • https://bagibobujinokat.weebly.com/uploads/1/3/5/3/135312275/ce978356.pdfIn PDF document text
    • https://cdn.sqhk.co/rebabafa/AjbjbBi/24133425107.pdfIn PDF document text
    • https://donedujawag.weebly.com/uploads/1/3/4/3/134315137/4867137.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2dc0326d-ac60-47d8-bf46-f2dc9d334570.filesusr.com/ugd/21b4a7_165f203e5ef947a1a9ed9220199711db.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2e1029f-c258-44b4-951b-f08469127250/77962979494.pdfIn PDF document text
    • https://11e0ccb5-01dd-4757-ae93-f6f3b4f5ca32.filesusr.com/ugd/1a2ce6_37fe58aca4a54998900515084799d46d.pdf?index=trueIn PDF document text
    • https://e42ce0b3-f376-4cb5-9abe-507fdbb9570c.filesusr.com/ugd/603474_fb6f2bfd1aa04d689dbb8bfa83654b97.pdf?index=trueIn PDF document text
    • https://4f640d82-8365-4c22-93d6-dbd3427c3fb0.filesusr.com/ugd/55e8b7_f7239842e63549268f2d62db63c60e5b.pdf?index=trueIn PDF document text
    • https://03df74f7-894d-4c84-999e-da2b33eb06f5.filesusr.com/ugd/4c7733_3866cb713106428fb4669005b12ebd33.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bb11922-09f9-4832-b107-794824df7978/how_to_fix_my_dyson_dc59.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0E 5924 bytes
SHA-256: a761ff315ce216ab3099a21c154d50ba26cb426263aaae382759606f3301785d
font_01_sfnt_off00011132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11132 10688 bytes
SHA-256: 496e1d5ca1e09c069884fa93f3a184fa9df5a5ef0006b0e1e2b9a916a0a63847