Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ba3c293edb366b2…

MALICIOUS

PDF

78.2 KB Created: 2020-12-03 00:16:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 1772e7691cf293bce7eee6aa23bab7e6 SHA-1: b412e0053ddf44967af2e892bdd24bcc5c281773 SHA-256: 8ba3c293edb366b2fe955fb4b3ec425078771cf3fad5cf388e60e6277e57b514
164 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is part of a link farm and uses urgency lures. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the presence of embedded URLs, including one pointing to 'traffnew.ru', indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffnew.ru/aws?utm_term=electro+reception+reading+answers+mini+ielts PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404990/normal_5faf3b0e3d941.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455399/normal_5fc1fc95e0cf9.pdfIn PDF document text
    • https://kizujaxaluw.weebly.com/uploads/1/3/4/3/134393650/povew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465128/normal_5fa7cd766c2e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401558/normal_5fbeb4a0bd80b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384463/normal_5f8c49d2a264a.pdfIn PDF document text
    • https://fufukarebalomok.weebly.com/uploads/1/3/4/3/134352968/91c4ec21e2.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/lurutopobi/marvel_future_fight_shadowland_floor_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/dust_form_pathfinder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc39b873-32f0-4bd6-91e6-2bc68c51e917/5021825587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4bf1691-9653-40b5-a54d-2c9c992fa321/spring_break_2020_trip_ideas_for_families.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03c121b3-9529-44ba-b8d3-5b326cd4ce8b/rajiverowogovurilomo.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/6511757248.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/99243753686.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/36130534992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0da570f6-5aaa-40de-a3b9-d10dac463ab1/sarasota_to_tampa_taxi.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_off0000f47c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47C 5444 bytes
SHA-256: 4eb06eae1cd4bf160ae2dc49910594b4a8039195ebae18c9927b09163f2a222b
font_01_sfnt_off00010704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10704 10380 bytes
SHA-256: d18232f8bacc6e3c414a70fa98f559d9e2c0a0b325d0ff35866be4af238055d2

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