Malicious PDF — malware analysis report

Static analysis result for SHA-256 41805579f7f86931…

MALICIOUS

PDF

69.2 KB Created: 2020-12-17 03:36:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f0804bc6df6d9ea6767237876577d03 SHA-1: de6bfcedd09e40961c88e1504cc66bb1ebc6f2eb SHA-256: 41805579f7f869319d4e54473f4f172df3b7b9ffd4baf262c6abd20bce60a47f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains a large number of external links, many of which point to other PDF files, suggesting a link farm designed to manipulate search engine results or distribute malicious content. The primary malicious URL identified is 'https://traffnew.ru/123?utm_term=cottage+farms+direct+phone+number'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffnew.ru/123?utm_term=cottage+farms+direct+phone+number
    • https://kilekawu.weebly.com/uploads/1/3/4/8/134857711/f6ba5416b9a2.pdf
    • https://luzolujimus.weebly.com/uploads/1/3/4/5/134505858/vipuva_nafepegel_nivanezan_rogebatofew.pdf
    • https://nedudefo.weebly.com/uploads/1/3/4/3/134389218/rixelivixavumisufuwe.pdf
    • https://cdn-cms.f-static.net/uploads/4408462/normal_5fc301ed2fedd.pdf
    • https://cdn-cms.f-static.net/uploads/4388813/normal_5fa2533a72542.pdf
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/4685109.pdf
    • https://widobane.weebly.com/uploads/1/3/4/3/134340358/2390498.pdf
    • https://zakiguranul.weebly.com/uploads/1/3/4/4/134480990/gosejepiludet.pdf
    • https://lepovomika.weebly.com/uploads/1/3/4/7/134701686/7957742.pdf
    • https://favalekubofir.weebly.com/uploads/1/3/4/7/134727868/37a11095a5b5abf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3cbd867a-f2c0-473a-a32f-7a2ab69c623b/wefenukavurazazipixu.pdf
    • https://s3.amazonaws.com/voxazedisula/fexaxi.pdf
    • https://uploads.strikinglycdn.com/files/b4e9d3b5-3ef9-4299-b002-f68096b9b118/11852062261.pdf
    • https://uploads.strikinglycdn.com/files/839e71a3-003a-4673-96fc-098392e3f3eb/how_to_crack_hickory_nuts_video.pdf
    • https://s3.amazonaws.com/farowug/pikagexepalu.pdf
    • https://uploads.strikinglycdn.com/files/3653c132-95cd-4b87-9056-8112fd9f0b4d/94533354202.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1b1.bin
eb8205be4ae00ed4b5c747566826e98ee549f9c889194feff99288b92e154545		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B1 5584 bytes
font_01_sfnt_off0000e483.bin
ef22405d6c4e28749f69ad0b40e5cfe814416cdf6f05b0b606be31ef264d38c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE483 10180 bytes

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