Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c68eeffc258f37d…

MALICIOUS

PDF

70.2 KB Created: 2020-12-24 20:42:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 11a292f0993408b8cbf05e126ecd1479 SHA-1: 07cf20354385038b4a58abb7b97b7bb3c394ec5a SHA-256: 9c68eeffc258f37d7a09bf56bf5a9d32ba8ed2e75a8c93ef4cbfe67b1e12dc3b
156 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier flagging it as phishing. The PDF contains a large number of external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The primary malicious URL identified is 'https://trafftec.ru/123?utm_term=d%2526d+5e+entertainer', which is likely used to redirect users to a malicious site. No scripts were extracted, but the presence of numerous external links suggests a phishing or malicious redirection attempt.

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://trafftec.ru/123?utm_term=d%2526d+5e+entertainer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455194/normal_5fa6dca8e8862.pdfIn PDF document text
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/jibupowawutomaf_rifiz_nifinodiwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407777/normal_5fa5464c5f995.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383471/normal_5f9582892c0db.pdfIn PDF document text
    • https://cdn.sqhk.co/nosuterib/hfhgiiX/tyrannosaurus_dinosaur_simulator.pdfIn PDF document text
    • https://vekazapez.weebly.com/uploads/1/3/4/6/134601327/d5f1691ad69fc7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478125/normal_5fd2d8d791398.pdfIn PDF document text
    • https://wimiberurazem.weebly.com/uploads/1/3/4/3/134351881/f0e1adc869b43.pdfIn PDF document text
    • https://boxatikavizag.weebly.com/uploads/1/3/4/6/134680825/zixikuzolik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415756/normal_5f9e6a6ce4128.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/5d3cab24-f698-4dbb-b8e3-6dd54d1ac755/ucsd_hillcrest_shuttle_live.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40203b8f-0d00-4d67-aedd-c1b0e60ecfdd/57256911795.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52113899-8333-4f94-bc8c-451e9de56180/57243449956.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0ac4b09-07ac-43ac-b879-1b94c41416a1/komaram_puli_canciones_de_vdeo_720p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8da6beb-83d9-4856-9fbc-0f1d9e3e75ae/sifezonesupevar.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_off0000da3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3C 4156 bytes
SHA-256: 4137e011fb50e940388b7a91a31e36f70741d8ce55ef6fbc7fb0314564e06879
font_01_sfnt_off0000e86c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86C 10504 bytes
SHA-256: 2c683e723d82af39efe8fa23746478ed1a5fb02767bc6638e85d8c9bf0f53809

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