Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0458685e418e21e…

MALICIOUS

PDF

83.2 KB Created: 2021-02-27 12:05:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 2eb98fda45c27fd671ca1c17cca1a0b1 SHA-1: cf19b6d20c46d4e9d6a215b302c75ed0d812c815 SHA-256: b0458685e418e21e0551aeb30d70990bcde079030ef2bdfdac01845afb2819f1
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 domains and are structured as link farms, suggesting an attempt to redirect users to malicious sites. The presence of 'utm_term' parameters in some URLs indicates tracking or obfuscation for phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://ponafet.ru/aws?utm_term=edgar+schein+organizational+culture+and+leadership+1985 PDF link annotation
    • https://cdn.sqhk.co/kosadara/bjfiijo/r-_type_dimensions_ex_ps3.pdfIn PDF document text
    • http://help-copyrightservice.xyz/819670732425a62b.pdfIn PDF document text
    • https://cdn.sqhk.co/javajadoj/hirUxhd/jejesutemikifajaworepebev.pdfIn PDF document text
    • http://fowirunuwajuk.iblogger.org/3882129452.pdfIn PDF document text
    • http://raguvigawak.mypressonline.com/manual_of_love_2_full_movie_watch_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwunikuneg/tjciUja/bad_day_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/vofonowul/gcOJjbl/vokelejigujavetewurebu.pdfIn PDF document text
    • https://cdn.sqhk.co/tudobele/jxpihYg/guresefarezegasinem.pdfIn PDF document text
    • https://cdn.sqhk.co/xivijela/wzijifh/4042605518.pdfIn PDF document text
    • https://cdn.sqhk.co/vedasukuki/hGbiiuZ/politics_definition_for_kids.pdfIn PDF document text
    • http://genusadnlo.space/54549545290c5tjb.pdfIn PDF document text
    • https://cdn.sqhk.co/zuwiwejagub/gjWhjZJ/11112089534.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sonasekofuxix.rf.gd/putesojore.pdfIn PDF document text
    • http://gapitufukiwiti.epizy.com/will_durant_the_complete_story_of_civilization.pdfIn PDF document text
    • http://wavopomop.rf.gd/byomkesh_bakshi_phire_elo_full_movie.pdfIn PDF document text
    • http://difenux.epizy.com/is_there_going_to_be_an_attack_on_titan_junior_high_season_2.pdfIn PDF document text
    • http://fajazimigig.atwebpages.com/72209861054.pdfIn PDF document text
    • http://savapiwanew.epizy.com/how_to_apply_for_rue21.pdfIn PDF document text
    • http://nupopejif.epizy.com/jazasigunuw.pdfIn PDF document text
    • http://rifobotulaw.rf.gd/jefolil.pdfIn PDF document text
    • http://radiviwix.onlinewebshop.net/dance_hits_songs_hindi.pdfIn PDF document text
    • http://kedisijusa.onlinewebshop.net/walmart_times_el_paso.pdfIn PDF document text
    • http://pudutew.rf.gd/miborelavuxagudafixose.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_off00010641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10641 5868 bytes
SHA-256: 7675a1ef426e744cf6a4cc9744ee0209b9a3661e1e980f7ea699e351ce6b046e
font_01_sfnt_off00011a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A49 10572 bytes
SHA-256: f51481bd7bb1689be5a264c2c010f5bffbc3b5f04830f11a0a9d3e0ac217bd0e

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