Malicious PDF — malware analysis report

Static analysis result for SHA-256 72e0165678eace08…

MALICIOUS

PDF

73.9 KB Created: 2020-12-16 18:25:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 013e9b2e9e888cc0a91d978656134ee1 SHA-1: b78cff9cdd6fb79e15ff67520a0067fa978247e7 SHA-256: 72e0165678eace0855684b772e2c663f04981796563b28f0ebc5804fc4d27419
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafffe.ru', which is likely a phishing or malware distribution site. The PDF structure and embedded content suggest it's designed to trick users into visiting this external resource, potentially leading to further compromise.

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/strik?utm_term=2017+bowman+draft+baseball+checklist PDF link annotation
    • https://lolipakefupixo.weebly.com/uploads/1/3/4/6/134614949/bilatorunarugija.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/e2ee440f-a6d0-48f1-8870-9afd34f91760/tevefalalizi.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/navevirave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85119cd2-f728-45f3-9b9e-63f68d959555/briggs_stratton_31c707_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/57710183774.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03871b99-44ea-4252-9547-d5fcc1c00194/marvin_elementary_school_calendar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e826bc43-454b-408e-a073-f9adce4b51af/tulipebaba.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/descargar_libros_de_eduardo_galeano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/310febb7-9a24-415e-836b-a5fb3040f533/gupedoxajij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9b71db3-32e4-472d-840f-075cb1e76d78/dusojilipatunuxuwibofoxip.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/kapatepi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2774ee9-f768-45ec-a168-d8b38d92b115/62702285308.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_off0000df63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF63 5868 bytes
SHA-256: 1a97ab6da8a69bce671533b2e993cf62764ea5638edf505bbea58e44d22ff26e
font_01_sfnt_off0000f34a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34A 12136 bytes
SHA-256: e9c3aa46d88e62220bd242aa9e140ff8ed0e527bbff5648a402862e1c292a60b

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