Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f0fab165c25f3ad…

MALICIOUS

PDF

73.1 KB Created: 2021-01-26 22:43:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0d36a69b0a22f5841eebdc14e0ebee8d SHA-1: fa8950adf0470fb8131fde960520541baab7b2f0 SHA-256: 8f0fab165c25f3ad62c5f566cb55c973f9ea3ab80d1a18b7ffa2a2998f257e7d
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous embedded URLs, many pointing to disposable domains and employing UTM parameters, strongly suggests a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains references to 'watch warm bodies online free 123', likely a lure to entice users to click on the malicious links.

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 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://leonvi.ru/123?utm_term=watch+warm+bodies+online+free+123 PDF link annotation
    • https://cdn.sqhk.co/vudararemane/ihi9Vgd/fishing_diary_mod_apk_appvn.pdfIn PDF document text
    • https://cdn.sqhk.co/wevafofed/hdLhfjh/smash_hit_2_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mozopojugode/ghhaied/drone_remote_control_distance.pdfIn PDF document text
    • https://cdn.sqhk.co/kokuxisa/ihipqhe/inside_out_and_back_again_left_behind_poem.pdfIn PDF document text
    • http://ruzopiter.iblogger.org/phenomenological_approach_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/seponidozit/Iggunij/wsdot_ferry_tickets.pdfIn PDF document text
    • https://cdn.sqhk.co/geroterunetu/aczM2hh/farms_village_happy_township_nj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jabelakejirer.epizy.com/nekapifepim.pdfIn PDF document text
    • http://daxevekiwenux.epizy.com/vuxukutitolitovab.pdfIn PDF document text
    • http://dukejujegu.epizy.com/bloom_s_taxonomy_levels.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/dictionnaire_juridique_franais_espagnol.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/494867411.pdfIn PDF document text
    • http://melumudinev.epizy.com/magic_rush_equipment_guide.pdfIn PDF document text
    • http://fewetero.epizy.com/nosegewadon.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/anaconda_1_full_movie_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/jamol.pdfIn PDF document text
    • http://kutepiguzusudax.epizy.com/xemob.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/nupumatazamaxizevuni.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_off0000dff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF7 5856 bytes
SHA-256: a4a0b2fb427a113458045e6d427618b3decdfabaaa30bbdbcec8af84e5f3c5b7
font_01_sfnt_off0000f3d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D4 10448 bytes
SHA-256: b439cf432234a2a49787f1da1861d19858a3dedd13d57f1394821759a1d0a084

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