Malicious PDF — malware analysis report

Static analysis result for SHA-256 78bd2200d06dd603…

MALICIOUS

PDF

81.1 KB Created: 2021-03-20 00:50:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2d61813130bc9fd5903918aaabb495ac SHA-1: 96be28090fd4a249bc69418896e01e2e4fae2b1d SHA-256: 78bd2200d06dd6036ec59c152749efd2a904df265e9a735d8e853fed6ab8da92
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/strik?utm_term=onkyo+tx-nr535+bluetooth+pairing PDF link annotation
    • https://cdn.sqhk.co/xonepogafix/cXCjjVM/708-_14_east_front_street_plainfield_nj.pdfIn PDF document text
    • http://lezebapobal.22web.org/chadbourn_nc_police_reports.pdfIn PDF document text
    • https://cdn.sqhk.co/vadavenaw/jjgcmjc/gacha_life_songs_twisted.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391024/normal_5fdf227d98d3f.pdfIn PDF document text
    • https://cdn.sqhk.co/sifajoxojif/jiqN2jh/goladeva.pdfIn PDF document text
    • https://cdn.sqhk.co/lunajevon/geehcih/puzzle_games_android_tablet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448542/normal_6045dd49c15c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410462/normal_6007288f74ca4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480149/normal_5fd23c85a5483.pdfIn PDF document text
    • https://cdn.sqhk.co/butituguxur/cihjaij/risk_analysis_techniques_in_construction_engineering_projects.pdfIn PDF document text
    • http://rimiminigi.22web.org/badshah_new_song_djyoungster.pdfIn PDF document text
    • https://cdn.sqhk.co/tagodepa/cKRjahd/horror_granny_scary_mysterious_house_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwagezo/ciehijf/xazudoj.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/pegebunov/house_music_beat_maker_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/app_store_for_pc_windows_8._1.pdfIn PDF document text
    • http://rowabereduxafu.epizy.com/cringe_in_fear_crossword_answer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90f3644b-f9ac-4b2c-8471-e893dfd3e0da/sebemalujofotagajiseniza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7bc95a4-5d23-482f-8bd4-a4db30d544c0/98399388828.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/esl_wire_anti_cheat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e32bd1e4-a933-443a-a047-b8055bd75bef/27159717912.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_off0000fee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE5 5624 bytes
SHA-256: 13eb84110ea812fc3ce7619a0393f808ef001c45f7b22adb7e8eacf76970d463
font_01_sfnt_off00011217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11217 10840 bytes
SHA-256: 1f03405fd35fb7bc60233371cca82fef3597fdf91d4dc5382f494db1f1e252f0

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