Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fea12dc93ce7a4a…

MALICIOUS

PDF

105.9 KB Created: 2020-11-24 06:52:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19b9a2d07062944386852e758dfa9a41 SHA-1: 5e16cedb7bfb982c8e7aad57e67a14aa10dc7674 SHA-256: 1fea12dc93ce7a4a32d729c598f4eb32f2f30cc794c586c7c4b4bf639ff6d41f
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of urgency lures further supports a phishing or social engineering attack pattern. Although no scripts were explicitly extracted, the PDF structure and link farm heuristic suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=fire+mage+7.2.5
    • https://cdn-cms.f-static.net/uploads/4420248/normal_5f9d591c3a1ea.pdf
    • https://cdn-cms.f-static.net/uploads/4420752/normal_5fad9138ac945.pdf
    • https://cdn-cms.f-static.net/uploads/4376599/normal_5f97ada6c449c.pdf
    • https://cdn-cms.f-static.net/uploads/4369760/normal_5f967187bbddb.pdf
    • https://todijaxazifaro.weebly.com/uploads/1/3/4/3/134342800/bifekowup-pabodirobox-xagaw.pdf
    • https://dotigima.weebly.com/uploads/1/3/4/4/134404546/mefogilefepib.pdf
    • https://lisefemibumosu.weebly.com/uploads/1/3/4/3/134339955/1176133.pdf
    • https://cdn-cms.f-static.net/uploads/4412900/normal_5fb821c3820dc.pdf
    • https://cdn-cms.f-static.net/uploads/4389365/normal_5f9cd7501774c.pdf
    • https://cdn-cms.f-static.net/uploads/4374703/normal_5fb00e43ca8aa.pdf
    • https://posalezonekat.weebly.com/uploads/1/3/4/6/134628665/semifeduvobukufa.pdf
    • https://cdn-cms.f-static.net/uploads/4384647/normal_5f8c5fc868ef6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/9840d643-269c-441b-a0ed-784bbbac015e/pivurazewa.pdf
    • https://uploads.strikinglycdn.com/files/888eea22-b347-4885-8119-3bffd47a76ca/384740844.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001618d.bin
8f356304a34269679ff2578717e890e675a5e209e425f58344ecceba50ba0fda		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1618D 24352 bytes
font_00_sfnt_off00012aa2.bin
e41f2d81a24ab2da3878f09d4415d2c3e5ed26503cc3b8e122da257f5935aa2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA2 4608 bytes
font_01_sfnt_off00013a4a.bin
5f9063d0b0e31f16ae3a3fa66c35047a5e3576809edc18ff449cb3971638d2a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A4A 11404 bytes
font_03_sfnt_off00018c11.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18C11 4324 bytes

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