Malicious PDF — malware analysis report

Static analysis result for SHA-256 261e1cdb0af2b870…

MALICIOUS

PDF

70.2 KB Created: 2021-03-22 04:37:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 2f6b0a8aaaba32bf12059edc0bbbd86d SHA-1: 6f1af169237b2ad605cd46f395d3dde95353c2b5 SHA-256: 261e1cdb0af2b870a47c7de90d3fe20af2c0adfe07553f2a1699c0e22edaa154
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO poisoning tactic. The document body, though heavily obfuscated, contains text related to a 'Nys dmv driver's manual pdf spanish', indicating a lure to trick users into downloading potentially malicious content. The presence of PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS heuristics strongly indicates malicious intent.

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://pelibifir.ru/strik?utm_term=nys+dmv+driver%2527s+manual+pdf+spanish PDF link annotation
    • http://euroshopmn.space/fix_hole_in_hardwood_flooro7cl1.pdfIn PDF document text
    • https://lijonalorobu.weebly.com/uploads/1/3/4/3/134340538/604f666a.pdfIn PDF document text
    • http://cethq.xyz/payback_period_calculation_templatejgksy.pdfIn PDF document text
    • https://nawobelif.weebly.com/uploads/1/3/5/3/135307193/366de.pdfIn PDF document text
    • https://cdn.sqhk.co/balaragu/gmZhfgf/32407431442.pdfIn PDF document text
    • https://cdn.sqhk.co/nawinirezuj/gZ7whh0/49533248561.pdfIn PDF document text
    • https://niraniki.weebly.com/uploads/1/3/4/6/134662237/3880119.pdfIn PDF document text
    • https://dufebekeromodi.weebly.com/uploads/1/3/0/7/130776386/5672073.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/hbAisig/26169783562.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/tamobalasu/89317450760.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/simibiwetasowapawubif.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/bhopal_gas_tragedy_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/vukexetenokanuwe.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/creative_parallax_website_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/bharat_movie_dialogue_video.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_off0000d357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD357 5448 bytes
SHA-256: a1326a12dcdf02f60129786bbe9dfc9dadb21e8b6ba47902c54645934775be5b
font_01_sfnt_off0000e5cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CD 11736 bytes
SHA-256: c317ce8ba1b70a09563d4e77034ee316c29be6307715403a0cf328ded88f65cf

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