Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3ef3092f6b1f709…

MALICIOUS

PDF

74.7 KB Created: 2021-05-06 05:02:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f4b6365bd32d0cfc7b72298c713df9ac SHA-1: a247455cccce7967e419c3587a5f9abb9f70e7f0 SHA-256: b3ef3092f6b1f7098eb4215961f84903a16383db91f287a3ab59bd82c295e147
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains references to 'The way of men' and 'wkhtmltopdf', indicating it's likely a disguised lure to external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/strik?utm_term=the+way+of+men PDF link annotation
    • http://levitajagukog.scienceontheweb.net/89378623203.pdfIn PDF document text
    • https://cdn.sqhk.co/pomodizad/hhn9ogg/dota_2_beginner_guide_2019.pdfIn PDF document text
    • https://kusezobovezuzeg.weebly.com/uploads/1/3/4/6/134689385/5422222.pdfIn PDF document text
    • https://kezugavamatuwe.weebly.com/uploads/1/3/5/3/135347357/vopatutapoligunid.pdfIn PDF document text
    • http://zaximudetebase.iblogger.org/zabozatogix.pdfIn PDF document text
    • http://tuzepidexa.22web.org/chirutha_full_movie_480p.pdfIn PDF document text
    • http://kopogaxepaku.sportsontheweb.net/60142113379.pdfIn PDF document text
    • http://tixesikixux.mygamesonline.org/vertebral_joints.pdfIn PDF document text
    • http://zofunubesosena.mypressonline.com/29088615726.pdfIn PDF document text
    • https://cdn.sqhk.co/gidenateg/c18heUY/31793914097.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/i1gd6pw/universe_silver_number.pdfIn PDF document text
    • http://rudexikuritisi.iblogger.org/jesus_amigo_letra_y_musica.pdfIn PDF document text
    • http://gebomomeza.22web.org/pojalo.pdfIn PDF document text
    • https://cdn.sqhk.co/resozasevej/cjgjaM0/dj_song_mixer_software_download_free_full_version.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://doxixitoxuneb.epizy.com/4617974368.pdfIn PDF document text
    • http://zotubune.myartsonline.com/representative_payee_form.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/2d_3d_animation_software_free.pdfIn PDF document text
    • http://julivaradisakit.rf.gd/govt_vytpg_autonomous_college_durg_exam_form.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/3rd_grade_math_fractions_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/44322096116.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/27179343740.pdfIn PDF document text
    • http://suvofaga.rf.gd/solo_guitar_tabs.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_off0000e669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE669 4844 bytes
SHA-256: 396390b2a826f741a491b541655c2eb30045ac5f5fcaffa76fed47363567871d
font_01_sfnt_off0000f6da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DA 10992 bytes
SHA-256: ba5ed8c8c5e7a1f74a7d4daf4e4b80f8b593d9b8ec767af0c1b02fc44d980998

Open this report in the interactive analyzer, or submit your own file for analysis.