Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d08a377f497fdc9…

MALICIOUS

PDF

62.5 KB Created: 2020-11-25 05:55:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28db682778b7f87379021872dcaa5b8c SHA-1: 5a8e83e3da4cc1ba3fc26a87ccbdb40f4543adb9 SHA-256: 6d08a377f497fdc93a45e929cc5e57996af6982b19d0a19fad889b8529c90fa5
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 intent. The PDF contains a significant number of external links, suggesting it is part of a link farm or phishing campaign. The primary malicious URLs identified are trafffe.ru and bedizegoresupa.weebly.com, which likely serve as landing pages or redirectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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
  • 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://trafffe.ru/123?utm_term=best+on+earth+roblox+id
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/xewuj.pdf
    • https://cdn-cms.f-static.net/uploads/4380411/normal_5f972722c4c08.pdf
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/4589730.pdf
    • https://cdn-cms.f-static.net/uploads/4372383/normal_5f8b94741c3c1.pdf
    • https://cdn-cms.f-static.net/uploads/4444353/normal_5fb30ddbcaf3c.pdf
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f88f5a96713f.pdf
    • https://cdn-cms.f-static.net/uploads/4390074/normal_5fb5f1a5dff6a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9139bd5c-b34b-466e-8056-c70b3596e2e4/dish_40_remote_codes.pdf
    • https://s3.amazonaws.com/pibajuwi/84025736037.pdf
    • https://s3.amazonaws.com/mafavuzenoliki/rosario_de_la_rosa_mistica_y_san_rafael.pdf
    • https://s3.amazonaws.com/bupijila/44383050059.pdf
    • https://s3.amazonaws.com/dobesogum/rapidex_english_speaking_course_in_gujarati.pdf
    • https://uploads.strikinglycdn.com/files/53466c69-63e2-4cbc-919c-cedfa5acd156/deburulosuvawegewosup.pdf
    • https://s3.amazonaws.com/jikopot/air_force_previous_question_papers.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b8b7.bin
4d1c2aed17a16e992a01a77f37dd865fb2c042e01cdce9eeabda22463bc5ea32
pdf-font-stream PDF embedded font (sfnt) at offset 0xB8B7 5172 bytes
font_01_sfnt_off0000ca46.bin
90e4e818f422eb10c1af555ba802be93dc85fe181cdb41a48576782968e18704
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA46 10416 bytes