Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdc51553a32355d6…

MALICIOUS

PDF

70.6 KB Created: 2020-11-12 19:55:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 89df8a374776e29b0f73241bf22486b9 SHA-1: d902a673ac321dfdf100d89b4702a79dbfe12166 SHA-256: fdc51553a32355d68b5750ed7e55a2089860095ceb6d126e8a67e9157b989bfe
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. The primary external URL observed is 'https://trafffe.ru/strik?utm_term=hakkarim+101+arkada%25C5%259F%25C4%25B1m+nerede', suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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=hakkarim+101+arkada%25C5%259F%25C4%25B1m+nerede PDF link annotation
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/7885719.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418574/normal_5fabf05925c73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378641/normal_5f8c7fd208182.pdfIn PDF document text
    • https://lidusibujoxoxo.weebly.com/uploads/1/3/4/5/134500869/463d6a9c9a283.pdfIn PDF document text
    • https://xelabuxu.weebly.com/uploads/1/3/4/2/134235382/kusigiwo_xizobofiterife.pdfIn PDF document text
    • https://mivijupa.weebly.com/uploads/1/3/4/5/134578330/045b10002.pdfIn PDF document text
    • https://zififawatef.weebly.com/uploads/1/3/4/3/134384507/gaxalenaros-jusadefoz-nuzekorekumudev-ruwaxo.pdfIn PDF document text
    • https://lotisawiro.weebly.com/uploads/1/3/4/6/134625457/5270533.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/lafozamubowitabolo.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/98299824806.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/gudadagevogovujatulapes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88cc115d-126c-4e8a-a261-8c65f8d3d610/ways_of_knowing_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/8439939903.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/spose_good_luck_with_your_life.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7ed9b9c-35b8-4bcf-879e-1b40f8c766fc/47990972049.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_off0000d13b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD13B 5260 bytes
SHA-256: 4edcb9900a5872dadfeaf2d71a93877669d0ba6ccc8ee5cc9d26d1e3ecd2475e
font_01_sfnt_off0000e309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE309 13048 bytes
SHA-256: 2cbbc256295cba6a9f226c93d9d663e61fcdfbde1450bc532a8d97568f704528

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