Malicious PDF — malware analysis report

Static analysis result for SHA-256 34906c0ed972f11a…

MALICIOUS

PDF

73.9 KB Created: 2021-01-03 13:53:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc605b4fa391da0ae5015591bd159bbb SHA-1: 59cb89681d27a45d3a95aff7deaa376f56173e20 SHA-256: 34906c0ed972f11acfbd59fbb47bb8b532b12bc68fc98078113e4edb0ecd0123
196 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or malware distribution lure, as indicated by the 'PDF_SEO_LINK_FARM' and 'SE_REMOTE_SUPPORT_LURE' heuristics. It contains numerous external links, including one pointing to 'https://traffnew.ru/123?utm_term=comptia+security%252B+pdf+2020', suggesting an attempt to redirect users to malicious content or download further payloads. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://traffnew.ru/123?utm_term=comptia+security%252B+pdf+2020
    • https://cdn.sqhk.co/nesunarimu/gbieDVA/snapchat_streak_back_2020.pdf
    • https://cdn.sqhk.co/sigidezok/bjhijiW/flight_simulator_games_for_pc_play_online.pdf
    • https://cdn.sqhk.co/miwizawi/hiLgchD/math_tricks_with_answer.pdf
    • https://cdn.sqhk.co/zurefaxenov/4vb8gcf/best_action_anime_2020_so_far.pdf
    • https://rodagekutav.weebly.com/uploads/1/3/5/3/135313742/xefiju.pdf
    • https://cdn.sqhk.co/dalogunutixo/Xnggphc/gorunetodozajuwu.pdf
    • https://gawosiluzetur.weebly.com/uploads/1/3/4/6/134631715/6522654.pdf
    • https://bebamewikirebu.weebly.com/uploads/1/3/0/8/130874540/4344601.pdf
    • https://cdn.sqhk.co/difanemifal/Jrgclgj/two_dots_travelers_trail_remix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2d4c7849-1221-4abe-ae17-e15d5af1f912/55932093513.pdf
    • https://uploads.strikinglycdn.com/files/53816a6c-8980-40e5-8faa-815be642d0b1/how_to_iron_clothes_with_an_iron.pdf
    • https://s3.amazonaws.com/sakaburepagase/horse_racing_word_search_answers.pdf
    • https://s3.amazonaws.com/jenagubadopi/mixcraft_10_torrent_download.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e318.bin
41aa1ac517b8da9aed46e6378ff79607e8a76626358005887f1b5bbe3c952dc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE318 5552 bytes
font_01_sfnt_off0000f5e4.bin
90983d2aab41e9873d0e08951433ec67ac2286f1ebe9ea8dcafe636a6abc123c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E4 10868 bytes

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