Malicious PDF — malware analysis report

Static analysis result for SHA-256 184e62155b271a87…

MALICIOUS

PDF

61.8 KB Created: 2020-11-19 00:28:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c3e30adf258f633f24e255bb0bd4f0ac SHA-1: 0a681453483ac314e97e2e8e495b9e37e58e55b2 SHA-256: 184e62155b271a8781036c691d0f1354687cdaedc80edb00f7235edf9eddfc78
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one pointing to 'trafffe.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, further supporting this. Although no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score point towards malicious intent, likely related to spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffe.ru/123?utm_term=go+math+assessment+guide+grade+6 PDF link annotation
    • https://fufijejelido.weebly.com/uploads/1/3/4/3/134351462/5404713.pdfIn PDF document text
    • https://viwezoluzuwa.weebly.com/uploads/1/3/4/4/134401695/xoxilezolat.pdfIn PDF document text
    • https://zarugekikivupa.weebly.com/uploads/1/3/4/4/134480545/9658818.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411250/normal_5faa8ae3244cd.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/jowutoneranemuk/bojemawakesugefadukaxuguw.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/rhonda_jones_obituary.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/gears_of_war_2_cheats_xbox_360.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/american_airlines_flight_attendant_jobs_atlanta.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/matupamugopotawegataxe.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/wuwetojumisaja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2fbfeb6-0a2b-4ea7-8112-93e3abc2ef6f/vonideremivemaj.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b35b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB35B 5392 bytes
SHA-256: f294d4858c89c748228d163366879c2d6fc36486eab32baf78c7cc6a3a58233b
font_01_sfnt_off0000c57f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC57F 11028 bytes
SHA-256: 825f3a940a9e6024cdce242e4bd6e96ea9a22f1cc667df8b0504c028fffc780f

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