Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0522123f420a46c…

MALICIOUS

PDF

80.6 KB Created: 2021-02-19 10:20:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 88e9d7137e6f4a79b36cf64f29ec5383 SHA-1: b1d04d25a5beb9475d919e120924b12d0077daa3 SHA-256: d0522123f420a46c7236835704ac1602d5756b60a0e592c368be07bb8029cbfa
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains metadata related to a 'Pioneer vsx-1123-k bluetooth adapter' and 'wkhtmltopdf', indicating it may be part of a lure for a product-related scam.

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://seumenha.ru/strik?utm_term=pioneer+vsx-1123-k+bluetooth+adapter PDF link annotation
    • http://detonic-de.website/tcgplayer_card_condition_guidem8pbi.pdfIn PDF document text
    • https://cdn.sqhk.co/nemalerute/igcjeid/rowawitub.pdfIn PDF document text
    • https://cdn.sqhk.co/mikevoponage/45CVgit/the_dark_knight_movie_story_in_telugu.pdfIn PDF document text
    • http://bikuribowe.22web.org/ac_curse_of_the_pharaohs_trophy_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464302/normal_5fc70896699a7.pdfIn PDF document text
    • http://daliadiago.com/bovikmtbgc.pdfIn PDF document text
    • https://cdn.sqhk.co/fipufose/haZjdF6/pac_man_ralph_breaks_the_maze_character_codes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448337/normal_600055a7cc789.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413851/normal_602e50bee1c54.pdfIn PDF document text
    • http://alifan.store/1995_yamaha_timberwolf_250_rear_end66dzs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392439/normal_5ff1173cce731.pdfIn PDF document text
    • http://creamspait.xyz/phpstorm_reformat_code_foldercy56m.pdfIn PDF document text
    • http://krokoboko3.xyz/wiregonuxopifibekedumojapywqm6.pdfIn PDF document text
    • http://cparta.moscow/69117041342t5e55.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gonesipida.epizy.com/delhi_master_plan_2041.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/xijekajubigixegu.pdfIn PDF document text
    • http://rorolavosi.rf.gd/gipadapurexu.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/child_s_play_1988_tamil_dubbed_movie.pdfIn PDF document text
    • http://gigezevozaf.epizy.com/gomuduruvobobu.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/51023980452.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_off0000fa02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA02 5760 bytes
SHA-256: 457fb48be6483c8f7327b153977ee8c08420d8c4cb9dba3c0e185fe855da3889
font_01_sfnt_off00010da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA4 11764 bytes
SHA-256: fdd3b0852745e70893356b20337c75d9b0c911cd0836f7edaa3676d38cc18628

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