Malicious PDF — malware analysis report

Static analysis result for SHA-256 083f2333e80bc1b5…

MALICIOUS

PDF

79.8 KB Created: 2021-04-09 04:26:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 59d8abbbad5413e58aaba6573be4239a SHA-1: 2ee0eab75511c407158846f28751779a0a1bbe37 SHA-256: 083f2333e80bc1b5bcc3a09995c4012661df7d2ccb03c4b7322f017bba787191
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that redirect to external sites, with one prominent URL being `https://soxebez.ru/strik?utm_term=what+were+the+roles+of+patricians+in+ancient+rome`. Heuristics indicate this PDF is a link farm on disposable hosting, and ClamAV detected it as `Pdf.Phishing.Trojan-d2568dad23a94d95`. The ML classifier also flagged it as malicious with a high probability. The document body, though heavily obfuscated, appears to contain metadata related to the URL's search query, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://soxebez.ru/strik?utm_term=what+were+the+roles+of+patricians+in+ancient+rome PDF link annotation
    • http://mujakomafadumuz.iblogger.org/bisimibexekexuwoda.pdfIn PDF document text
    • https://vuwonogi.weebly.com/uploads/1/3/5/3/135300132/fibajer.pdfIn PDF document text
    • http://futajef.medianewsonline.com/kinetic_molecular_theory_of_gases_questions_and_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovebakeb/aAv4Fhb/new_nokia_edge_android_phone_2017.pdfIn PDF document text
    • http://kutebirodomo.22web.org/bostitch_f21pl_nail_gun.pdfIn PDF document text
    • http://tufalufodedo.iblogger.org/49460675327.pdfIn PDF document text
    • https://cdn.sqhk.co/xumirikebixo/gedUTjg/zojogakasidiwos.pdfIn PDF document text
    • http://dalosizofovabes.medianewsonline.com/57250931126.pdfIn PDF document text
    • https://dopozagipixa.weebly.com/uploads/1/3/2/7/132741545/3991976.pdfIn PDF document text
    • http://nomiwujexu.22web.org/misa_alrededor_de_tu_mesa.pdfIn PDF document text
    • https://rirumuzog.weebly.com/uploads/1/3/4/1/134109041/zosiremevokalir.pdfIn PDF document text
    • https://cdn.sqhk.co/rorifugera/igMKhgN/kik_friend_finder_online.pdfIn PDF document text
    • https://sizosadul.weebly.com/uploads/1/3/3/9/133986432/bepoxibokad.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluzezufe/gd46jfq/water_slide_decal_paper.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pinakebe.rf.gd/xoduvadanapilitidare.pdfIn PDF document text
    • http://banagegogidilad.rf.gd/brochevarevarura_movie_songs_naa.pdfIn PDF document text
    • http://koxaxinum.epizy.com/basic_instinct_3_dual_audio_300mb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c91cc92-e704-4682-9a51-7c148d5900b7/tijaxebiw.pdfIn PDF document text
    • http://xedawobu.atwebpages.com/behringer_xenyx_502_mixer_manual.pdfIn PDF document text
    • http://xumuturil.epizy.com/gufapa.pdfIn PDF document text
    • http://vomematomeze.epizy.com/buku_amdal.pdfIn PDF document text
    • http://lagamifex.epizy.com/mysql_tutorial_point.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cea2edce-74b5-4644-ac84-870895af5634/49109458903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a549abe-2b72-490c-b016-2f4a7fa9e8b0/disefogetefiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c870ff0-7e00-49e3-bcc9-c578a8b899e9/iso_22000_clauses_list.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_off0000f675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF675 5360 bytes
SHA-256: 03822ba89b03246eabfcd21bc3ac8a9ba6566171d12e4b8c5ad4556bc2e4ce11
font_01_sfnt_off000108a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A1 12296 bytes
SHA-256: 84883771131bd590dcab0fa5544e885b89859987fb164e0be8cc3046f346dff5