Malicious PDF — malware analysis report

Static analysis result for SHA-256 715a5721bf6f9428…

MALICIOUS

PDF

69.9 KB Created: 2021-03-30 01:28:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ed7d128128cdfcc48011c8897fc8c12f SHA-1: 7821673a9cc94caa11a92517b4ad0821f8d04be3 SHA-256: 715a5721bf6f9428c63b3e3b5929e28edeb63e95dddb7a22b4050e714979d46e
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting or suspicious domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains keywords that could be used as lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dugedepap.ru/wix?keyword=tune+bot+gig+manual PDF link annotation
    • http://katermore.ru/income_guideline_for_medicare_extra_helpngyx9.pdfIn PDF document text
    • http://vizuwubifazezix.22web.org/oregon_map.pdfIn PDF document text
    • http://cancandance.org/atividades_sobre_poligonos_5_anop144y.pdfIn PDF document text
    • http://mybatut.store/458055914612fpzd.pdfIn PDF document text
    • http://metryck.info/dodisisanofigg050.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://molaken.rf.gd/60136707947.pdfIn PDF document text
    • https://5a8aee2d-3d68-4c09-98ed-743c9c56d6fd.filesusr.com/ugd/460efe_066306fa0b4e4ce09606eb66fe635c81.pdf?index=trueIn PDF document text
    • https://eadb47d6-6712-4ecd-aa5a-2cdcf2d90b86.filesusr.com/ugd/c844bf_22424df677a24591886c7aa235a5f054.pdf?index=trueIn PDF document text
    • http://bibuxidon.rf.gd/13419121510.pdfIn PDF document text
    • https://835a0401-7144-467e-aacc-710587930ffc.filesusr.com/ugd/432cba_d83c980d8af44b0fb437afee8cf05f8d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/penale/79721821032.pdfIn PDF document text
    • http://tixisodid.epizy.com/26658949492.pdfIn PDF document text
    • https://a6f18165-9bfd-46c9-8f51-0ab50cd0b687.filesusr.com/ugd/265c7a_5b90bc14bf6245c59e3a9ee1b16e7e08.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/how_to_design_typography_poster.pdfIn PDF document text
    • http://gemuviwir.rf.gd/85138672528.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/29610276380.pdfIn PDF document text
    • http://kolixuvurivol.epizy.com/nelson_biophysics.pdfIn PDF document text
    • http://wiraxoxepopiret.rf.gd/floccinaucinihilipilification_in_a_sentence_yahoo_answers.pdfIn PDF document text
    • https://ac6a5e95-3fab-4d4b-a7e7-0ef4c71e5929.filesusr.com/ugd/32c278_4902195b20f944fab36002f38bb0e6a6.pdf?index=trueIn PDF document text
    • http://mekigutesazi.epizy.com/katyusha_sheet_music_piano.pdfIn PDF document text
    • http://lopumupukerodu.epizy.com/after_effects_templates_logo.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_off0000d504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD504 4820 bytes
SHA-256: b2be9b52bbea7711dc5eaa45396d46d27295c6021551c47894bdfb486094f569
font_01_sfnt_off0000e55d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE55D 11088 bytes
SHA-256: e1ad8fded58919014856a54da44d44912318b748a99cb34fae98281db16511fc

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