Malicious PDF — malware analysis report

Static analysis result for SHA-256 73f3a9df8be2ca46…

MALICIOUS

PDF

86.2 KB Created: 2021-04-01 13:54:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1578bc68a121d0c91836adf3479192ed SHA-1: ef83d343245b211c5630d0bf3d542a92a7a8dd4f SHA-256: 73f3a9df8be2ca46a4a44da1217636dde9a757239cf16f09f56351401345d39a
126 Risk Score

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 0.9990

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://midufefew.ru/award?keyword=beating+the+street+pdf+drive PDF link annotation
    • http://devicesprotectionforusers.site/how_much_does_all_my_sons_moving_payp8j8p.pdfIn PDF document text
    • https://cdn.sqhk.co/welosezu/iggedgL/fishing_areas_near_me.pdfIn PDF document text
    • http://mumopajikex.mygamesonline.org/como_hacer_un_alambique_casero_para_destilar_alcohol.pdfIn PDF document text
    • https://cdn.sqhk.co/fazofasufiwu/hib1hjr/mayhem_battle_pvp_major_gun_shootings.pdfIn PDF document text
    • http://boomua.site/rekinasiwunl5joz.pdfIn PDF document text
    • https://cdn.sqhk.co/mugolino/ehbfhcn/graphic_design_jobs_nyc.pdfIn PDF document text
    • https://cdn.sqhk.co/kunimanujage/didLvgh/ultimate_fishing_simulator_greenland_guide.pdfIn PDF document text
    • http://vepenuvix.mygamesonline.org/programa_festival_internacional_cervantino_2020.pdfIn PDF document text
    • http://alania365.ru/nikowob9u6ej.pdfIn PDF document text
    • https://cdn.sqhk.co/wanaxowuwot/H8gegfc/gawevalojedem.pdfIn PDF document text
    • http://dezlice.ru/zokobarukan0nvyl.pdfIn PDF document text
    • http://ig-copyrightnoticehelp.com/86310109040g5hqy.pdfIn PDF document text
    • https://cdn.sqhk.co/kuvapipitol/b5gfPgi/hammerson_plc_annual_report_2015.pdfIn PDF document text
    • https://cdn.sqhk.co/medujebukoma/jhjmRjf/96667462988.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://detonic-shop.website/39122581443ermok.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/baltasar_gracin_libros.pdfIn PDF document text
    • https://cdn.sqhk.co/winogolelog/ijg4qs1/macaw_parrot_life_expectancy.pdfIn PDF document text
    • http://raifaisentgo.online/43606454728ry9rf.pdfIn PDF document text
    • http://passive-income.ru/behringer_xenyx_x1204usb_usb_mixer_with_effectsjcary.pdfIn PDF document text
    • http://fuvidevifa.scienceontheweb.net/instrumentum_laboris_amazon_synod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://serinuzosazojup.epizy.com/purple_cowboy_wine_canada.pdfIn PDF document text
    • http://kofezinidabefu.epizy.com/87055987881.pdfIn PDF document text
    • http://dugupafado.epizy.com/tumabuwigubitowuzag.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001295b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1295B 19308 bytes
SHA-256: 817580112483c83f1ccca34990b5c0e4c9d588df83216ca2f323d17f61593f61
font_00_sfnt_off0000ed14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED14 5380 bytes
SHA-256: 65fd995fc7f6a9068bf7f81daad3d0b1f68200e68f828f5c5c14a94992335983
font_01_sfnt_off0000ff69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF69 14096 bytes
SHA-256: 51a1d64e03f0fd1e5dc14f8bc2aa41c0241fba66e4b579c35c6034eecce8c26c

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