Malicious PDF — malware analysis report

Static analysis result for SHA-256 10daae0c7fc6b20a…

MALICIOUS

PDF

97.1 KB Created: 2020-12-31 16:50:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: e2aeb16a03f3bc1bc8651d5d4979086b SHA-1: 17448cf1da86ce9049f17b19427dcce10228aa2e SHA-256: 10daae0c7fc6b20a42d921b19f8be51373e049e983899eabf1c0ac273818df0c
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to drive traffic to potentially malicious sites. The ClamAV detection and ML classifier also indicate malicious intent, specifically flagging it as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the presence of numerous external URLs, including one pointing to 'trafftec.ru', strongly suggests the document is designed to redirect users to phishing or malware distribution sites.

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/strik?utm_term=civil+war+trust+animated+map+gettysburg PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446151/normal_5fb59a698359c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504568/normal_5fea05c3252bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491433/normal_5faae840bc3ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380237/normal_5fbd8dee22ed4.pdfIn PDF document text
    • https://cdn.sqhk.co/joxufejod/gjcYOBz/monster_truck_destruction_odd_games.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448545/normal_5fed927473b8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366382/normal_5f89c2bab282a.pdfIn PDF document text
    • https://jepololazatozuj.weebly.com/uploads/1/3/4/6/134601538/5974446.pdfIn PDF document text
    • https://worowisirokisid.weebly.com/uploads/1/3/4/8/134856274/2461025.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/5a520ee7-fc40-4e4b-b607-d4dfd8cefadc/easy_clue_scroll_casket_osrs.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/bikini_body_guide_2._0_reddit.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_off00013e5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E5B 5576 bytes
SHA-256: 9a79eb2df20d4d7ccb9c47ad9c84108acc54bedb602ca3cf487359a89aa06a1f
font_01_sfnt_off0001514b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1514B 11456 bytes
SHA-256: 70a69d33f296f7a5a851bddbc2ed8ddb77573820d8fc43d330e430edef3d8a7b

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