Malicious PDF — malware analysis report

Static analysis result for SHA-256 92a0df11b2a3ea3d…

MALICIOUS

PDF

82.7 KB Created: 2020-12-31 05:42:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 10d3c2dda30683fe20ed99b7a1d35235 SHA-1: e706d0159b44a6e3e6f16ea212cb55ed0976bca2 SHA-256: 92a0df11b2a3ea3d07f692cf42cdb59000841a997ae7189de3471e925afab520
176 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, exhibiting characteristics of a callback phishing lure. It contains a mass of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or redirection mechanism. The document body is heavily obfuscated, but the presence of external URIs and the callback lure heuristic indicate an attempt to direct the user to malicious content or engage them in a fraudulent conversation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://traffset.ru/strik?utm_term=strategy+games+switch PDF link annotation
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/renuroz_ligaj.pdfIn PDF document text
    • https://risibazizugati.weebly.com/uploads/1/3/4/7/134710005/fukatuzi-wetuf-sozerufukemog-telef.pdfIn PDF document text
    • https://xusawoji.weebly.com/uploads/1/3/0/7/130739635/dinufarujosuwop_butib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445103/normal_5fa1019cb83e4.pdfIn PDF document text
    • https://logekififej.weebly.com/uploads/1/3/4/5/134502341/1218487.pdfIn PDF document text
    • https://xazunavawotop.weebly.com/uploads/1/3/4/7/134724639/542b42b46fc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468550/normal_5fbf04da9fd68.pdfIn PDF document text
    • https://vixeregipidodig.weebly.com/uploads/1/3/4/5/134592438/fozetelenemuvop.pdfIn PDF document text
    • https://disaximineta.weebly.com/uploads/1/3/4/8/134883765/niwinifewenumawovu.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/kegubinefuda/baobab_fruit_benefits.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/76829956452.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/vimamokokikowezaponiwijo.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/xipevuxewirewo.pdfIn PDF document text
    • https://s3.amazonaws.com/fokena/97193510813.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/muzukasugaxejomadu.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/gejutojofir.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_off00010413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10413 5476 bytes
SHA-256: 25fbc05202a1be515344d51db35f77ade10b57c8ec08da2b7f967d4cca4b58d0
font_01_sfnt_off000116a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A1 11560 bytes
SHA-256: 052d97784dfa250b2e553b0b55f16db1ff4b3e0adeaa3896fb86fd103d8a4234

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