Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f9719319a237a74…

MALICIOUS

PDF

61.5 KB Created: 2020-11-18 22:02:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: bf39c1c1eff0bd0d4698975c7e2dc350 SHA-1: b904742a8423c19b3f3dab4575a60e765bc826f3 SHA-256: 7f9719319a237a743a359ca7ee22ea86ff75c952dd63926aef1404f7036712e7
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic further support this, indicating the document's primary purpose is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffine.ru/strik?utm_term=tom+ve+jerry+indir PDF link annotation
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/noned-refakoxis-malomi.pdfIn PDF document text
    • https://bebamewikirebu.weebly.com/uploads/1/3/0/8/130874540/a43fe167bd2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408482/normal_5f9a10e37fb8f.pdfIn PDF document text
    • https://dofazodasi.weebly.com/uploads/1/3/0/8/130873943/1bc4307cb5d.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/zapanexise.pdfIn PDF document text
    • https://pudukodup.weebly.com/uploads/1/3/1/4/131407572/9f1ac3284bbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415300/normal_5f95899fca80b.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/vepulakanug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fumiposamisur/factor_tree_worksheets_grade_6.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/algebra_worksheets_gcse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7a600a5-4113-4d61-a728-6e5c143f6653/game_company_tycoon_codes_2020_august.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95099c99-84c3-4913-93b9-423916d8a98f/71643054088.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d98ac711-d738-4df4-8c8e-ba9005c545f6/rejadugazunevosedovuzel.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ad0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD0E 4444 bytes
SHA-256: 83e54fd27e9c10b454dc8a5156d5ca33a44c572e04fea9a4f04fd16bc2be7c1f
font_01_sfnt_off0000bc10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC10 9264 bytes
SHA-256: 95ceedd79eccdb91411cf866ec6a2edea5763f25ee9195867b4126e541ddebab
font_02_sfnt_off0000dbb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB0 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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