Malicious PDF — malware analysis report

Static analysis result for SHA-256 33ac1b60f756bb29…

MALICIOUS

PDF

70.3 KB Created: 2020-12-28 08:49:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 08260569b0647721ae658d56a14a5fd8 SHA-1: 88b1e4f5c76424692194525dc9261bfc28978116 SHA-256: 33ac1b60f756bb2963cc0fe9377d9456d7eac9c28f75deed238163f60b7dcca4
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains numerous external links, suggesting a link farm or redirection mechanism. One of the primary links points to 'trafftec.ru', which is likely part of a phishing or malware distribution scheme, disguised as piano sheet music.

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/aws?utm_term=daydreamin+ariana+grande+piano+sheet+music PDF link annotation
    • https://cdn.sqhk.co/gogoturowib/jhhiiaI/shipwreck_cove_spray_park_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427809/normal_5f9a53a7f2cc8.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/3d21f99.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/fMlhjhj/stack_buffer_overflow_return_address.pdfIn PDF document text
    • https://rofuvawe.weebly.com/uploads/1/3/4/3/134363923/nabisi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420031/normal_5fa7e748df16d.pdfIn PDF document text
    • https://mojipidu.weebly.com/uploads/1/3/4/3/134391160/vopuxixado-fojuso-nokagotexilujok-dunoxigonapigo.pdfIn PDF document text
    • https://bafuvaki.weebly.com/uploads/1/3/4/3/134336870/4394144.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/57139dd1-e858-4416-84b7-3b909f55c215/betidagod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88854ab4-9f83-4941-bd31-782ed6a55256/uncharted_waters_online_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f15e022-704f-4b75-a689-b82e15195a86/41358484678.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9db7c00e-fed2-48ee-a1a6-0e738fe66017/aera_conference_2020_registration_fee.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf3cdffa-faac-437d-a1d7-b371b9497cc3/15990422820.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ac376c6-13d4-4882-91fe-47b64e31b914/reludomuluzuru.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_off0000d5d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D6 5556 bytes
SHA-256: 66fdff008646c61f4a69de6ce36eae2a7dbc2ad460b5aa2d5c92975aebf45c6e
font_01_sfnt_off0000e8a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A7 10368 bytes
SHA-256: e49542a94eb77a6a98b07f5e9d0c0c745da34b4229be8eb263ee1bcd580534ab

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