Malicious PDF — malware analysis report

Static analysis result for SHA-256 267af8943ded306d…

MALICIOUS

PDF

68.2 KB Created: 2020-11-25 21:20:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: deb9d967f52f6b95b6d9d72b6632fdb7 SHA-1: 252b4cc7d8fc46965725f06ed717d5c3d47aa429 SHA-256: 267af8943ded306ddecb5a35069a382836d2619ed9dca5cef4f06cd6c3e5b975
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms and phishing campaigns. The heuristic PDF_SEO_LINK_FARM indicates a large number of outbound links, and one of the primary URLs, 'https://trafffe.ru/strik?utm_term=passport+photo+coupons+target', suggests a lure related to a deceptive offer. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=passport+photo+coupons+target PDF link annotation
    • https://mawuwakisi.weebly.com/uploads/1/3/4/3/134342681/2771561.pdfIn PDF document text
    • https://famotufenimuz.weebly.com/uploads/1/3/4/1/134132127/9972702.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/panemunefufam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376612/normal_5f95351a11d25.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/kakef/sujexonotel.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/42345757115.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/dawajutalefov.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/84355247000.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53432ba5-8e5f-41c2-ab35-31bbc3ab0c4f/dedawirutixaxafu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b65f2cff-70ac-468f-9753-49f74424df6b/71568489933.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/hobby_shop_anchorage.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/list_of_chemical_companies_in_tamilnadu.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_off0000cd6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6B 5164 bytes
SHA-256: 6a7005f03b68018d6b76012de60209611915a95a7217d94c2ce95a461d402f83
font_01_sfnt_off0000def7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF7 10976 bytes
SHA-256: 33b3afed9557b48eea436dcbb934565298a9050ab1ef5f45355bfc3bf95ec1e3

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