Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d4827250474e763…

MALICIOUS

PDF

72.4 KB Created: 2021-01-25 21:20:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4e4e7de0e7305ea5ca41206e7a480908 SHA-1: 76b62a6c084a329a350a42920658e9ed8e0dd6ae SHA-256: 1d4827250474e76324c195462b9393ac545a6661fffd921bc1425dc7a252031c
166 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing lure. The document body, though heavily obfuscated, contains references to a 'benevolent fund form' and is associated with multiple external URLs, many of which host further PDF documents. The 'remote-support tool lure' heuristic indicates the document likely attempts to trick the user into installing or running such software, which is a common tactic for malware delivery or gaining unauthorized access.

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
  • 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
  • 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://druttle.ru/aws?utm_term=benevolent+fund+form+2019+punjab PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404121/normal_5fe9fe371ba12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379842/normal_5fed2465ee2de.pdfIn PDF document text
    • http://kinorio5.xyz/skyland_trail_costry3rd.pdfIn PDF document text
    • https://cdn.sqhk.co/sixepatexup/fX10ggD/pokemon_go_wallpaper_pc_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403418/normal_5fdd370a780ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413455/normal_5fd91341b6b5f.pdfIn PDF document text
    • https://cdn.sqhk.co/mapelimujeku/D8hidji/kpop_groups_list_male.pdfIn PDF document text
    • http://milanbeach.fun/gebasemoxezuferorulufalt10gf.pdfIn PDF document text
    • https://cdn.sqhk.co/latipizi/Lbk7hci/iihf_2020_live_scores.pdfIn PDF document text
    • http://moneymaya.site/fallout_3_game_of_the_year_ps3_walkthrough4fj3s.pdfIn PDF document text
    • http://osummer.space/movie_in_the_heat_of_the_night_trailerv0qv8.pdfIn PDF document text
    • https://cdn.sqhk.co/poxufape/gngglgd/business_administration_careers_in_ghana.pdfIn PDF document text
    • https://cdn.sqhk.co/fazejitev/jhfGHgi/teamviewer_quicksupport_download_mac.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/zalisujezajaje/88693315180.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_off0000dcdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDD 5816 bytes
SHA-256: 2fcd42e98cddcd609ba93aed29efec69d025f3a6e8d6a1a7acac606f14c398f5
font_01_sfnt_off0000f093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF093 10636 bytes
SHA-256: 51d3fb1c12e09438a007df48b915b9b9678366a3542aaad2389bc440fff958ad

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