Malicious PDF — malware analysis report

Static analysis result for SHA-256 4999e5800ed9f2af…

MALICIOUS

PDF

42.4 KB Created: 2020-11-09 15:35:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 127d93b604158cd683a8a589a6c193c5 SHA-1: d0c2565dd4d955d1496875e9bb094c65a85d12ed SHA-256: 4999e5800ed9f2af94e2d1a7718dd8efa78fbb7551a9753c224ced8e4454d684
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The primary external URL observed is https://trafficel.ru/aws?keyword=strat+wiring+diagram+with+blender+pot, which is likely used to direct users to potentially malicious content. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://trafficel.ru/aws?keyword=strat+wiring+diagram+with+blender+pot PDF link annotation
    • https://zififawatef.weebly.com/uploads/1/3/4/3/134384507/2117464.pdfIn PDF document text
    • https://vezexozozufizus.weebly.com/uploads/1/3/4/3/134372857/tapidagapipu.pdfIn PDF document text
    • https://zufugorutamivas.weebly.com/uploads/1/3/4/4/134401118/gegotagew-penote-gotexovomis-fideganu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369765/normal_5f91190b61b1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374207/normal_5f9b58b5e0a7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5f87729b49097.pdfIn PDF document text
    • https://vubosetupis.weebly.com/uploads/1/3/4/5/134594606/kamulugifomu.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/ff5e212b-151b-427f-8fb6-2d8c65e224b9/kamijoxinaxeduwejer.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/all_quiet_on_the_western_front_chapter_7.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/pdf_market_leader_business_english_course_book.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/fominekukuvonokaginimiz.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/zimizetojaxavawusewovex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4be3c728-b6be-42be-a0ba-d238a8066e98/7812876693.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/rolling_thunder_vietnam_sydney.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/67584564298.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_off000065a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65A2 5532 bytes
SHA-256: 8e53c822c8a9bc9054a91d7aa2cc2a4c5a1bdb9a1076049384e7232024c845e2
font_01_sfnt_off0000784f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x784F 10264 bytes
SHA-256: 9d560613e8108a1c86a34ae6197e8b651101ff0dd9ec863c9e4aadd854bce310

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