Malicious PDF — malware analysis report

Static analysis result for SHA-256 96fb3307f3078097…

MALICIOUS

PDF

76.5 KB Created: 2021-01-23 00:18:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 66600f91d8c9cca87a7c131a80290a17 SHA-1: d18ab0f0b9d397a64c703026029b920995874927 SHA-256: 96fb3307f30780971ade092cd9ba3c33e67db677f3852ec3551d8d1b40dbd511
184 Risk Score

Malware Insights

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

This PDF file contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also flagged this PDF with a high probability of being malicious. The document body is heavily obfuscated, but the presence of redirector links suggests an attempt to phish or deliver further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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=helm+chart+template+quote In PDF document text
    • https://site-1174103.mozfiles.com/files/1174103/2709600655.pdfIn PDF document text
    • https://site-1168007.mozfiles.com/files/1168007/partial_interval_recording_data_sheet.pdfIn PDF document text
    • https://site-1192107.mozfiles.com/files/1192107/12743774799.pdfIn PDF document text
    • https://site-1175201.mozfiles.com/files/1175201/mastercraft_x23_surf_edition.pdfIn PDF document text
    • https://site-1168202.mozfiles.com/files/1168202/u_are_the_reason_lyrics.pdfIn PDF document text
    • http://jezolagewe.iblogger.org/32827313047.pdfIn PDF document text
    • http://vemasujananexu.22web.org/sowezogupetodojebeget.pdfIn PDF document text
    • https://site-1176409.mozfiles.com/files/1176409/8107129179.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/dezajok/24644278096.pdfIn PDF document text
    • http://medevigad.epizy.com/wixawilabinanesazazubi.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/lazepe.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/netflix_en_tablet_lukt_niet.pdfIn PDF document text
    • http://fabonek.rf.gd/kikixilinepoma.pdfIn PDF document text
    • http://bukofitezude.rf.gd/android_auto_latest_apk.pdfIn PDF document text
    • http://buxazub.epizy.com/one_piece_bounty_rush_apk_english.pdfIn PDF document text
    • http://vipaviveza.epizy.com/sonic_all-_stars_racing_transformedtm_demo.pdfIn PDF document text
    • http://jesebikalag.epizy.com/64080178929.pdfIn PDF document text
    • http://vamagirizotaro.rf.gd/84599987439.pdfIn PDF document text
    • http://jirizaxewusi.epizy.com/boss_bengali_movie_songs_from_musicjagat._com.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_off0000ed8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8B 5084 bytes
SHA-256: 81e6bcb14eb55362a4f41d08fcf93c3161f3147fa7b2c0a2bd7576393e7d9e00
font_01_sfnt_off0000feaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAA 11048 bytes
SHA-256: be4a2698a433c8a321cf863944d377050ce717f56b06137ae3cf605f95c0f441

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