Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cc375efec06723b…

MALICIOUS

PDF

71.6 KB Created: 2021-01-16 12:29:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: dde4c9449a5972c57d710072a679fca9 SHA-1: 9428d111cac56188d5faa499f4420066b2f6c123 SHA-256: 2cc375efec06723b39fd35bc00350c084cc6d8bf10b3b8240fc21f6fbacd604d
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous external URIs, including one pointing to 'traffine.ru', suggesting it is part of a link farm designed to redirect users. The presence of multiple disposable hosting links further supports a malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/aws?utm_term=java+11+jdk+mac PDF link annotation
    • https://cdn.sqhk.co/guwuweri/iphajdv/origin_game_maker.pdfIn PDF document text
    • https://site-1176433.mozfiles.com/files/1176433/rocka_bowling_3d_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/sifajoxojif/gSTgcQE/batteries_plus_anchorage_locations.pdfIn PDF document text
    • https://cdn.sqhk.co/gulifunanale/ieMgghh/solar_system_easy_drawing.pdfIn PDF document text
    • https://site-1166647.mozfiles.com/files/1166647/road_racing_car_games.pdfIn PDF document text
    • https://site-1238523.mozfiles.com/files/1238523/93988566517.pdfIn PDF document text
    • https://site-1250347.mozfiles.com/files/1250347/bandhan_video_song_3gp.pdfIn PDF document text
    • https://site-1172627.mozfiles.com/files/1172627/28315642552.pdfIn PDF document text
    • https://site-1211253.mozfiles.com/files/1211253/rabebonewin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kovilowab/xominepabonoxop.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/zenovufuragikugoseb.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/outlook_address_book_location.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_off0000d97a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97A 5020 bytes
SHA-256: eae4fe9197ae78db179bb8d88816da1864c9832776d3c17e6e8164c5e41fb6d2
font_01_sfnt_off0000ea9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9F 11428 bytes
SHA-256: 28cff70908b716da7942464eab8fa1201d376d1f5d68a7d07e968c7966763fa7

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