Malicious PDF — malware analysis report

Static analysis result for SHA-256 92dd2d21333a4d2e…

MALICIOUS

PDF

65.6 KB Created: 2020-11-11 22:00:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 09ad318db84bfd75dae145f30c0afbb8 SHA-1: 5517c1b3ffcf608becc0e121dda53fbae8c8f9e7 SHA-256: 92dd2d21333a4d2ed8b3a9dc469972ede9b3f7729d04a76d5f84c2cc9f357c40
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to benign-looking documents but some are to unknown domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it is designed to redirect users to malicious or deceptive websites.

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://trafftec.ru/strik?utm_term=warhammer+40k+kill+team+starter+set PDF link annotation
    • https://baxojozejaxofo.weebly.com/uploads/1/3/4/5/134586757/04b87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410674/normal_5f9a7908615dc.pdfIn PDF document text
    • https://xijiruxexewige.weebly.com/uploads/1/3/4/7/134725886/nutisok.pdfIn PDF document text
    • https://wotemaruli.weebly.com/uploads/1/3/4/3/134366333/wosurekezunojo.pdfIn PDF document text
    • https://labajilawuja.weebly.com/uploads/1/3/1/4/131406369/vakezo_kifakavusinu_sodowubifuxu_vekawe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403408/normal_5fa0569fec125.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408976/normal_5f9727455ca6f.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/1f567c47-96ed-4e24-bddc-201e729b2656/english_grammar_in_use_elementary_su.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08243c66-7f3f-4ba1-b550-eabb9ca86df3/onan_7000_generator_troubleshooting_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/basutaputefofiku.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/pinterest_nails_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98ab852c-807a-4127-bc0f-f4d3d77e90de/vamaxekidokemowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c6a3161-cb10-4673-ba26-6d826f147c6c/36414038131.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_off0000c3ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3CE 5232 bytes
SHA-256: 460889a32e2f5e489ca2f33c69ec85db58718ecc864c743a8944975d76212871
font_01_sfnt_off0000d57b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD57B 10628 bytes
SHA-256: 3b0be8d80f5b9a26d0c67cd0b59d9e8fc4080e5be689a9f670f786c6771209be

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