Malicious PDF — malware analysis report

Static analysis result for SHA-256 560f7f2bad28eb7d…

MALICIOUS

PDF

64.3 KB Created: 2021-01-21 13:48:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b1e23e6e33bfaf7b0d644f3dcc3256ed SHA-1: c8ce4adfd1e5d2ef6b16311030c1016d970fa0a2 SHA-256: 560f7f2bad28eb7de4aacb69095fe8cc799be3b4ed7a88cf139fc1dc500200ce
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains a significant number of external links, suggesting it functions as a link farm to distribute malicious content or phish users. One notable URL, https://jottigo.ru/123?utm_term=victor+corpse+bride+pop, is directly associated with the PDF's content and is likely a primary distribution point.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/123?utm_term=victor+corpse+bride+pop PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373519/normal_5fd3b3ad60f90.pdfIn PDF document text
    • https://budamasut.weebly.com/uploads/1/3/4/9/134903336/nunuvumuvabawirij.pdfIn PDF document text
    • https://xuwupeloz.weebly.com/uploads/1/3/4/7/134734270/fijefotemiboba_namob_nuxafore_zaruseni.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417537/normal_5fc5ac378b115.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384307/normal_5fbba8802a0be.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fizaxo/bin_sachivalay_paper_solution.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/vunekodafaden.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/baal_veer_250_full_episode.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/lenel_onguard_7._2_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/cabify_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/jezofoxowodanifolokasu.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/nifapubeburapamut.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/clinical_laboratory_standards_institute_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/heathens_roblox_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/57843065760.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/jixog.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_off0000bb3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB3C 4932 bytes
SHA-256: f9b388c7bb403087e06a1a0c34c50db49412dbbd2f7c4ec3ff8d17ba5ea357b8
font_01_sfnt_off0000cc0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC0D 12436 bytes
SHA-256: c3e52b4de101af7869fefcccba30579dc2917b22673a8c39c1f64f06c76e25a4

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