Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb6f6ff8e55179cb…

MALICIOUS

PDF

77.4 KB Created: 2021-04-22 14:29:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: acbb92e68bd1a7416afadf0d49ecf72e SHA-1: 6be005a248a364325ed25bffc5e213352208892c SHA-256: eb6f6ff8e55179cb3e5a8307b59021dca722775e5ff62729d1f1c3bff26c2745
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one specifically identified as a malicious URI leading to 'https://nipisod.ru/strik?utm_term=list+of+sacred+geometry+symbols'. ClamAV detection and ML classification strongly indicate this PDF is a phishing or malicious document. The embedded content, though heavily obfuscated, suggests an attempt to disguise malicious activity as a benign document.

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://nipisod.ru/strik?utm_term=list+of+sacred+geometry+symbols PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/11f3462e-dbdb-46b3-9d32-148e29d5c408/52845191865.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84d4aa85-bfdb-4c9d-898f-c037dcb638c5/the_man_that_corrupted_hadleyburg_mark_twain_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c03eb55-40f4-42bd-9a92-fc370208050b/zerolulevexukisujivam.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/bidule_111_manual.pdfIn PDF document text
    • https://e62d90d9-845b-491d-b9b1-804d55ccd6e6.filesusr.com/ugd/6af1ed_121aa459340d447ab1ad9216a249fd10.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nowonovege/adulterers_full_movie_123movies.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/65183674100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd103871-b978-4436-b4c5-21655a04d56f/pamuge.pdfIn PDF document text
    • https://s3.amazonaws.com/xulikamul/sorow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/843ac761-89c8-4697-96c7-8701117491ab/migogare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab872d47-ee1e-4b1e-943e-6f07ad8bab8e/rotigufirinukopisobatitut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61c32b9d-1063-4e08-8d40-87ae1bfe1980/10698607737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c72b613-8450-4659-8009-d633dab01b2b/schwinn_213_recumbent_exercise_bike_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc66b6b5-5917-453d-bc65-8dbc7ba3b654/how_to_improve_english_speaking__writing_skills.pdfIn PDF document text
    • https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_0f5fe4ef55774ae390a0f458e30d66e4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2a811fd-c55e-4cd7-9da1-d95a7e4cbe2e/reckon_accounts_printer_not_activated_error_code_30.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d80014e9-e8e1-4952-ba9d-6bdfab9ec971/liburarapedilurez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f741b308-62cf-4605-8423-3e7f6bbae25c/panasonic_th-42px60u_power_cord.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_off0000f1b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B6 5524 bytes
SHA-256: bd2d590d7419a143851b15e67e6206e89b20cbc3e9eea967cce758b618148f88
font_01_sfnt_off00010477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10477 10588 bytes
SHA-256: ef11b8f1ca01f8a6e8b2c990fed2f05126d774199afbc40317bb158619a45692

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