Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a26c2e5914a26c7…

MALICIOUS

PDF

68.7 KB Created: 2021-02-28 20:24:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: ed7812172b9f32b2f0b150f4314fa79d SHA-1: 6e26c9f3aff1bf37e1d1e01fa277f28e889c73b4 SHA-256: 0a26c2e5914a26c7d5b27c7fc0221ba043a644a9a84cf7014b1dd1b31925a971
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDF files, suggesting a link farm or SEO abuse tactic. One prominent URL, 'https://leonvi.ru/award?keyword=fake+books+for+decoration+india', is directly embedded and likely serves as a lure. ClamAV and ML classifiers strongly indicate maliciousness, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The presence of embedded URLs and the link farm structure point towards an attempt to redirect users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/award?keyword=fake+books+for+decoration+india PDF link annotation
    • https://musigimipipo.weebly.com/uploads/1/3/4/4/134470090/8017625.pdfIn PDF document text
    • http://discout.online/6319393497227wri.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426280/normal_5ff684f67f51f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368751/normal_5ff9354212325.pdfIn PDF document text
    • https://farenutatovepo.weebly.com/uploads/1/3/4/5/134502273/b2c2dbc03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471275/normal_5fda2698736c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490266/normal_5fd1b7ae16b40.pdfIn PDF document text
    • https://luwuruguvuwotom.weebly.com/uploads/1/3/0/9/130969706/supobokonexenov-sonugabasol-xazebusubonabu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370744/normal_5ff7a1606e992.pdfIn PDF document text
    • http://ag-management.space/free_bible_study_notebook_templatekr122.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/ronenitevodo/motivation_letter_template_latex.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/53537358512.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/barley_flour_nutrition_information.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/42744511064.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/bafukafepimaxavu.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/6764464020.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_off0000d086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD086 5144 bytes
SHA-256: c32eede5b055134542a98b61b0b646301f5cc214834797bae031bbe11559a9b3
font_01_sfnt_off0000e216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE216 10428 bytes
SHA-256: a6b84942353e96914a7c95b6e918764e5cf924dfb03a52e4a3239bcde8c7e0eb

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