Malicious PDF — malware analysis report

Static analysis result for SHA-256 c965212d2ba8502a…

MALICIOUS

PDF

69.9 KB Created: 2021-05-17 07:43:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 151cc7db6c6b8de40b0e084336bef2b3 SHA-1: 75110b2956207adadffe6ffd465e868fd45e18b0 SHA-256: c965212d2ba8502a7f9f89ffb14a198aa2316de0ad5d6f6998e6cf01f8efaa05
166 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://crophysi.ru/strik?utm_term=el+hobbit+3+castellano+hd PDF link annotation
    • http://findssldz.xyz/what_is_the_best_cva_muzzleloaderi03u5.pdfIn PDF document text
    • http://teachersaid.fun/muvufadedafiforuxumk6k2j.pdfIn PDF document text
    • https://dipediras.weebly.com/uploads/1/3/0/7/130739778/nepaw-lavozoleveno-balewumas.pdfIn PDF document text
    • https://leresidatebij.weebly.com/uploads/1/3/0/7/130776374/penujimejaxebifefa.pdfIn PDF document text
    • http://kijareraja.22web.org/20787119468.pdfIn PDF document text
    • https://nedetuvozuwe.weebly.com/uploads/1/3/4/6/134699612/5649054.pdfIn PDF document text
    • https://lilawowawumoxo.weebly.com/uploads/1/3/1/4/131453384/458b4b5832db.pdfIn PDF document text
    • http://boguzimaro.getenjoyment.net/basic_electronics_short_questions_and_answers.pdfIn PDF document text
    • https://bumopajuri.weebly.com/uploads/1/3/0/9/130969054/jeluzibanonaj-mejavinuki-xetojof-wokud.pdfIn PDF document text
    • http://rubodedi.iblogger.org/act_science_data_representation_practice.pdfIn PDF document text
    • http://vevufilusik.scienceontheweb.net/lasizi.pdfIn PDF document text
    • http://idclick.cash/gonilekofoxajewigizalirblfe0.pdfIn PDF document text
    • https://sibomimotilelib.weebly.com/uploads/1/3/4/2/134235458/tasejigez.pdfIn PDF document text
    • http://folugomobok.getenjoyment.net/argumentao_jurdica_teoria_e_prtica.pdfIn PDF document text
    • https://xoxomupufolud.weebly.com/uploads/1/3/0/9/130969418/bc3c4736db0fbb9.pdfIn PDF document text
    • http://vagijuderotogur.22web.org/bangalore_current_weather_report.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nerezusilanake.atwebpages.com/94444604258.pdfIn PDF document text
    • http://vimixof.onlinewebshop.net/10885262586.pdfIn PDF document text
    • http://zamutodud.rf.gd/polugogibizegepodif.pdfIn PDF document text
    • http://pozajuw.atwebpages.com/fijabedemetemibiwewe.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_off0000cfb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB9 5192 bytes
SHA-256: c61bd9f5238176b7b261bf241c9925c0cee804b748f2ca6fea465cadbabda517
font_01_sfnt_off0000e15a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15A 12372 bytes
SHA-256: d37ced7df5dffeb65bf1ce37ccf7015c477fcfecc19b27d4917ed8592c4b6152

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