Malicious PDF — malware analysis report

Static analysis result for SHA-256 90080d739965b081…

MALICIOUS

PDF

65.4 KB Created: 2020-11-14 01:46:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e7c7942ba1f3fccb1850fa8b560a96ed SHA-1: 6d79a988b7de721ebec75e56f8cd88384e1dbd3e SHA-256: 90080d739965b081ba13f357a13d70d1714d319c1b7a5e808bb23bf20d4e6acb
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO link farms or phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' and the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly indicate malicious intent. The embedded URLs suggest the document is designed to redirect users to potentially harmful websites.

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 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/aws?utm_term=necrotizing+pneumonia+treatment+guidelines PDF link annotation
    • https://metubunotawe.weebly.com/uploads/1/3/4/5/134595280/916cfc8.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/daxotatamote.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381541/normal_5f96b928f29bf.pdfIn PDF document text
    • https://sexutenevasasi.weebly.com/uploads/1/3/4/3/134306733/titoxujorata.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405674/normal_5faae2c68ed6b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aa75330-0296-4cab-93f0-4e3704baf7f0/16574774905.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f49b582-4e8c-4294-98b0-55b4307b413a/10687679251.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baf0e75b-3e40-4af5-9049-876d20470a52/simn_vargas_morales.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c018d26-c894-4935-80bc-198fb7e7fa14/ak_parti_secim_sarkisi_dombra_indir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5e9981e-93f9-4fee-80ea-68ff3bc939e8/zajixema.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/44940001171.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_off0000c5df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5DF 5412 bytes
SHA-256: aba4321095a2dca4073f3a7f87a8581692af04d92cb1202c2b9b4210f828fcfd
font_01_sfnt_off0000d83e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD83E 9636 bytes
SHA-256: b99d86fe6a2b84366d62680bfe693788dfca36d8da205e5c5e4c463c6591f388

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