Malicious PDF — malware analysis report

Static analysis result for SHA-256 c07174ada9c87935…

MALICIOUS

PDF

71.2 KB Created: 2021-02-16 08:54:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f664d9ab1561018c6bf1c30cb7de2ac SHA-1: 119a5bab1fd73d54dd8be878ff942e1aec7d0d82 SHA-256: c07174ada9c87935376b8bc3b24ffc762dc4d39d6f1d2e51f3fed4147fe87445
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, indicating a link farm or phishing attempt. The embedded URLs likely lead to further malicious content or phishing pages. No scripts were extracted, but the PDF structure itself facilitates the redirection to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wix?keyword=meiosis+reading+guide+answer+key
    • https://pipenibeteza.weebly.com/uploads/1/3/4/5/134508730/3c90d302ef66.pdf
    • https://cdn-cms.f-static.net/uploads/4420238/normal_5fd2517f1476a.pdf
    • https://tamipabofoj.weebly.com/uploads/1/3/4/8/134876193/7450068.pdf
    • https://cdn.sqhk.co/tinulafi/d4fAShY/77571094629.pdf
    • https://vibakifekapob.weebly.com/uploads/1/3/1/3/131398015/74d596b11949f.pdf
    • https://cdn.sqhk.co/sovokeduseb/WR8IINi/rozotosorepasus.pdf
    • https://rexaririwe.weebly.com/uploads/1/3/1/6/131637114/5843517.pdf
    • https://static.s123-cdn-static.com/uploads/4380876/normal_5fcbc832ac10f.pdf
    • https://cdn.sqhk.co/momogajopi/giMhfJ4/pound_cake_recipe_gluten_and_dairy_free.pdf
    • http://virutezofulodud.iblogger.org/drums_backing_track_free.pdf
    • https://cdn-cms.f-static.net/uploads/4476946/normal_600cfcbd3f672.pdf
    • https://cdn.sqhk.co/wapogade/GFiehcC/maths_tricks_with_answers.pdf
    • https://cdn.sqhk.co/birenejar/jiiigjX/56167006768.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jilevatawew.epizy.com/mezevumovuxamazuviku.pdf
    • http://resifidivef.epizy.com/cash_flow_statement_analysis_and_interpretation.pdf
    • http://puguvapalovuzub.rf.gd/dorasejuvajojej.pdf
    • http://javixisapuv.epizy.com/napra_guidelines_for_non_sterile_compounding.pdf
    • http://pulawev.epizy.com/connectwise_university_report_writer.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7b9.bin
881527b78769943863289267f8bb9f279e76c484cfa279909db34dc6d53f01e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B9 5224 bytes
font_01_sfnt_off0000d9ae.bin
d6dba550acdf77f8fa6bf639de15b6677f12fb3a9e504a297643785273f34190		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AE 9732 bytes
font_02_sfnt_off0000fb22.bin
35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB22 16036 bytes

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