Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2d209c6ce7e2691…

MALICIOUS

PDF

61.3 KB Created: 2020-11-14 22:07:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d5dc060307d9ec22d16d1cfe573f5cc9 SHA-1: 11c9ece2331327c3959ef2bb3687fb15865e7596 SHA-256: c2d209c6ce7e26915929fcf76716a68cbbc70050b3f8bce681cb81658a421bf1
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, suggesting a malicious intent to redirect users to potentially harmful websites. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were directly extracted, the PDF structure and embedded URIs indicate it's designed to facilitate the download or redirection to malicious content, likely through a JavaScript exploit.

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://trafffi.ru/aws?utm_term=five+senses+worksheet+for+grade+3 PDF link annotation
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/rigajeviwor_megasunip_pezojopip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445739/normal_5fa4a40cc7e6c.pdfIn PDF document text
    • https://baletepo.weebly.com/uploads/1/3/0/7/130776023/tubewivijumamej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443809/normal_5fa915eca9926.pdfIn PDF document text
    • https://kifugezob.weebly.com/uploads/1/3/4/5/134529667/2074031.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368962/normal_5f8c0c91231ce.pdfIn PDF document text
    • https://sakifawabepufa.weebly.com/uploads/1/3/4/4/134466371/59cf4021f.pdfIn PDF document text
    • https://xitukuwelup.weebly.com/uploads/1/3/4/3/134340625/gipij.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/6bc6760d-6e72-40f1-af9d-1c6ce362a57c/31058551275.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3477389-8bb0-435b-8f63-051b15bef3d1/20545129707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69d139bb-3951-4508-833d-dd7f5ed89c44/op_rewards.com_robux.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_off0000b22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB22B 5472 bytes
SHA-256: 795cc7053e994cc56f02190365f173a770fcc86b0c8299fac318ce02b3c153c2
font_01_sfnt_off0000c4e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E1 10364 bytes
SHA-256: d869e722e2124a3701b518a46eb758c432a3eefefc9524496f8b5640b6f99daa

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