Malicious PDF — malware analysis report

Static analysis result for SHA-256 7971e6c2edff32a7…

MALICIOUS

PDF

58.5 KB Created: 2020-11-24 10:06:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ed89e578304449754c751d3e435feee0 SHA-1: 3d44265874c8b45506187d1943af5a206b55a6a0 SHA-256: 7971e6c2edff32a77d59136da092b589a6542f84fa25a53fdaa2f583946535aa
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The primary malicious URL identified is 'https://trafffe.ru/strik?utm_term=love+mei+case+replacement+parts', which is likely used to redirect users to malicious content or phishing sites. No scripts were extracted, but the structure and heuristics strongly suggest a phishing or malicious redirection attempt.

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/strik?utm_term=love+mei+case+replacement+parts PDF link annotation
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/rowugo.pdfIn PDF document text
    • https://vefesipawadupo.weebly.com/uploads/1/3/4/7/134746991/gijakowixoni.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/pefogotibisu_todarurako.pdfIn PDF document text
    • https://disaxugotusineg.weebly.com/uploads/1/3/1/8/131871710/rimigid.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/genedesowul/42424521611.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/words_with_nto.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/bifujubatatirepivefid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1158f31d-5355-4646-a2fd-153789b268a9/pufajepur.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/govev.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/jiwasa.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/german_shepherd_dog_puppies_for_sale_in_iowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84456181-164a-48a6-9249-f0b88256c198/nadip.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/memphis_weather_map_37075.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_off0000ab9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB9B 5080 bytes
SHA-256: 48a8d6abf4e7064e1bac777dc891949023c4aa2ea0308ba7d44d4e8492dfa352
font_01_sfnt_off0000bcd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCD5 9488 bytes
SHA-256: 1780bd203e2ff9371cb0af854ceb842ec48820c1559933252bef6d38051550e8

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