Malicious PDF — malware analysis report

Static analysis result for SHA-256 80da525f20cb538b…

MALICIOUS

PDF

76.2 KB Created: 2021-04-04 16:35:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3fd68ae7468d5e38c12be3682bd6e1b4 SHA-1: 267cdc39c6b90eb78cf469790de059e5e522f77f SHA-256: 80da525f20cb538b79174e4c4f000616a2e88b12d0cb1e1538d0c010b9070905
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or SEO manipulation tactic. ClamAV detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', further indicating malicious intent. No scripts were extracted, but the presence of numerous URLs points towards an attempt to redirect users to potentially harmful sites.

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://kuzutuzo.ru/strik?utm_term=oster+kitchen+center+mixer%252Fblender PDF link annotation
    • https://zomipawir.weebly.com/uploads/1/3/4/8/134899005/jujixujixazulev-xeguxazedel-dedameninidisox.pdfIn PDF document text
    • https://polabobaxadujo.weebly.com/uploads/1/3/4/7/134775235/7acfc67.pdfIn PDF document text
    • https://suzoniku.weebly.com/uploads/1/3/4/4/134456843/rabigazadet.pdfIn PDF document text
    • https://jelezasi.weebly.com/uploads/1/3/5/3/135347821/785337.pdfIn PDF document text
    • https://nevedafixi.weebly.com/uploads/1/3/1/3/131398567/jonolepiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490133/normal_6024c313e88b4.pdfIn PDF document text
    • https://sumibudagat.weebly.com/uploads/1/3/4/3/134310224/vuxegof-moxelutosesifi.pdfIn PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/wanavozisugub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496582/normal_5fcdac91d2aec.pdfIn PDF document text
    • https://jixawapideraje.weebly.com/uploads/1/3/3/9/133997308/zeviduzo_rexelat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500692/normal_5feb324a9b1d1.pdfIn PDF document text
    • https://direwuberegenis.weebly.com/uploads/1/3/4/3/134361890/xalib.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/babuxufarizuxur/xilukusokuta.pdfIn PDF document text
    • https://8909b315-4d59-4940-aabf-0fdaa532e0ad.filesusr.com/ugd/4542d9_b5796eb01aff4f7f81d8919d955825f3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sewamos/kokinizerunukiligakidufo.pdfIn PDF document text
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_bd20ba4cdfa24a1d9cceededbc8a6d9b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tamovagag/exhaust_pipe_installation_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/dopanixoparaju.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_off0000ece7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE7 5304 bytes
SHA-256: 1cd27511071d64bf62f45044e96255676719e1479e44e0ba87a35eb3cad40907
font_01_sfnt_off0000fed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED1 10984 bytes
SHA-256: 0e72c23edd5bb6acd02e5049ff169cc329a447fc08d0134b4ed19ed1ee1796eb

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