Malicious PDF — malware analysis report

Static analysis result for SHA-256 5207cc4205f91f36…

MALICIOUS

PDF

79.5 KB Created: 2021-01-21 14:06:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: f711396de4f8c04f3b63879994c3b62d SHA-1: 75d5382586fb188d31b0ae6b9043ad8130ff76d1 SHA-256: 5207cc4205f91f36417cc2630d6ead6ec9391e2db0eca0db6ccc759a49ae3e70
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are used in a link farm. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content is designed to trick users into installing software, likely to facilitate further malicious activity. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://jacksth.ru/aws?utm_term=can+you+use+chrome+extensions+on+android PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464715/normal_5fa3788749d56.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369173/normal_5ff6594f55247.pdfIn PDF document text
    • https://cdn.sqhk.co/lusimalifa/hi7qMhi/fitepumolik.pdfIn PDF document text
    • https://cdn.sqhk.co/ximepadogi/jhpje1E/81245751369.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452835/normal_5fd19aaf52baf.pdfIn PDF document text
    • https://cdn.sqhk.co/veludewozen/jeTXi5W/baseruxilisazu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424036/normal_5ffcba7ddbc91.pdfIn PDF document text
    • http://penoligis.22web.org/american_gastroenterological_association_ulcerative_colitis_guidelines.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454171/normal_5fe3ffd3edefd.pdfIn PDF document text
    • https://cdn.sqhk.co/konidadelan/iehhIje/grand_speed_light_robot_battle_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f9555ce55f62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413120/normal_5fb598aa4f0b2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://terezeso.epizy.com/pagalworld_bhojpuri_video_song_2019_mp4.pdfIn PDF document text
    • http://rivowotow.epizy.com/98022382950.pdfIn PDF document text
    • http://vujofif.epizy.com/new_bengali_song_audio.pdfIn PDF document text
    • http://favekagopu.epizy.com/zenonia_4_class_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/gokuxenabagetelupefuret.pdfIn PDF document text
    • http://zuronixo.rf.gd/ashtavinayak_movie_all_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/circuit_training_limits_and_continuity_review_answers.pdfIn PDF document text
    • http://lexojowal.epizy.com/cavite_state_university_rosario_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/workout_routine_for_weight_loss.pdfIn PDF document text
    • http://bezopiwuzalobit.rf.gd/2949783295.pdfIn PDF document text
    • http://kutugujipix.epizy.com/envelope_template_letter_size.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_off0000fbbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBC 5224 bytes
SHA-256: 42e4049d3d3328dfe513d51823b567da70637a1024211d93cfe8a58e41abf82d
font_01_sfnt_off00010d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D57 10372 bytes
SHA-256: fb4bb9b250dd9210cbbfbf788ee465c63846202bf7f7830e70dbca0c80ad92bc

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