Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf288218f7247a6f…

MALICIOUS

PDF

61.1 KB Created: 2020-12-25 23:39:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 53dca70e2350a408ed4281b223ffe6e2 SHA-1: 7bf281ebcca8192294b6355ff1ab5239bde55f4b SHA-256: bf288218f7247a6f2742d03af8698e042cdde72cb6fe445fd95449bb8cfd5790
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified as a "PDF_SEO_LINK_FARM" heuristic, suggesting a malicious intent to redirect users to potentially harmful websites. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a "Pdf.Phishing.Trojan". No scripts were extracted, but the presence of numerous external URLs indicates 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://traffking.ru/strik?utm_term=meb+cocuk+oyunlar%253F+ates+ve+su+buz+devri PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420025/normal_5fd7a6372f661.pdfIn PDF document text
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/1369480.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393346/normal_5f91052419f6c.pdfIn PDF document text
    • https://resuzomesidi.weebly.com/uploads/1/3/4/7/134746605/8291394.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393193/normal_5fe35d3836c3a.pdfIn PDF document text
    • https://jezilifubi.weebly.com/uploads/1/3/4/8/134887413/d3a66523641e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488314/normal_5fbd743157b74.pdfIn PDF document text
    • http://abanaimamhatiportaokulu.meb.k12.tr/In 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/b552d5bb-6875-46b6-b6eb-ecf40c1e537d/luxatuzixazenefazikozewag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/334e583e-1802-4c79-b2f9-d3cb076dabe7/66188811839.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c92e30b9-bed0-47d3-916a-b0ab0c039d65/rit_fabric_dye_tie_dye.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b96eea5c-c6df-4fc4-8a91-ed4bd72e8b0d/gidiguganetunemunaz.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_off0000afb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFB9 5496 bytes
SHA-256: 1cb0fc187615cad87d6c665d1b7caf435e525be8cb67b48469508ad1a6cbad98
font_01_sfnt_off0000c29b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC29B 11128 bytes
SHA-256: c36676486f0c8192448cdd001be21e72d6c9f2cd0f01e6100717ba185d700f59

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