Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d8231e71dfb3297…

MALICIOUS

PDF

70.2 KB Created: 2021-03-25 18:39:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 45d28a8d2530e37b46a26389ac9880a9 SHA-1: 18a4bbf9a50a2696bf473cd26ae59d607523422a SHA-256: 9d8231e71dfb32973d06e05fc0c7e87ea88aaf26332ab549e9127e6b75ee25e6
66 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9993

Heuristics 4

  • 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://xezojetit.ru/wix?keyword=altec+lansing+manual PDF link annotation
    • https://nituxokijawagez.weebly.com/uploads/1/3/0/9/130969825/muramukinufu.pdfIn PDF document text
    • https://romubavopu.weebly.com/uploads/1/3/4/8/134884942/b8917cb656.pdfIn PDF document text
    • https://lokanasa.weebly.com/uploads/1/3/5/2/135299929/a7a1ccd66.pdfIn PDF document text
    • https://cdn.sqhk.co/minofavazu/fgfibjd/shortcut_run_as_administrator_command_line.pdfIn PDF document text
    • https://zafasasuk.weebly.com/uploads/1/3/4/7/134713251/lanaxep.pdfIn PDF document text
    • https://kopudezazuxunob.weebly.com/uploads/1/3/1/4/131408344/af76d.pdfIn PDF document text
    • http://kartaidatodemeleri.com/mugidedobusewewenogy2r8n.pdfIn PDF document text
    • https://kagozekexep.weebly.com/uploads/1/3/5/9/135956698/2080060.pdfIn PDF document text
    • https://cdn.sqhk.co/xexogataza/hjjQkeY/xejerifemo.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/jgfieig/brain_for_monster_truck_2021.pdfIn PDF document text
    • https://cdn.sqhk.co/wepiwuvume/Ajcjajb/world_war_2_planes_dc.pdfIn PDF document text
    • http://biggymstoe.com/insurance_claim_form_template05lud.pdfIn PDF document text
    • http://kpovli.ru/body_language_analysismbm63.pdfIn PDF document text
    • http://foyou.store/entry_of_the_gladiators_sheet_music_clarinetw25ox.pdfIn PDF document text
    • https://cdn.sqhk.co/dubibuwa/Njihgji/xipidelis.pdfIn PDF document text
    • https://girosiwubu.weebly.com/uploads/1/3/0/7/130740458/vojujovovonanifakimo.pdfIn PDF document text
    • https://vurejubi.weebly.com/uploads/1/3/1/4/131454114/jolagasabakuliv.pdfIn PDF document text
    • https://cdn.sqhk.co/naketego/QOhfjeN/38441212752.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/purixifusipelid/ip_subnetting_made_easy.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/55671354450.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/gta_5_cheats_pc_online_money.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/what_line_of_latitude_is_the_tropic_of_cancer.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/what_is_the_best_wifi_extender_for_verizon_fios.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_off0000d4e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E3 5012 bytes
SHA-256: 26c042b6646db165bef667e367eac009920517694a315a5f8d15fd0c2273736e
font_01_sfnt_off0000e5e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E2 10772 bytes
SHA-256: fe416ee18c784310c799fea477632ba4214f928ca0708f1b26c19ed1238c5186

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