Malicious PDF — malware analysis report

Static analysis result for SHA-256 321852a5678f52e3…

MALICIOUS

PDF

76.3 KB Created: 2021-03-19 08:40:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 29132725a54dc17aeaf0f6a7d8d25c9b SHA-1: 6f840d12f908fd1c2b1175ec726d23d5c7ec7fca SHA-256: 321852a5678f52e328d80bfcb209d7d4105e5fd8899d13318f5c5c942f5d23b1
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 0.8041

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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://baarspo.ru/award?keyword=alister+mcgrath+books+pdf PDF link annotation
    • https://cdn.sqhk.co/mubasetopagu/hbogjBj/22630588095.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/Goge6ib/lean_bulk_workout_plan.pdfIn PDF document text
    • https://cdn.sqhk.co/pesasotiro/czgMltK/amazon_kindle_apple_books.pdfIn PDF document text
    • https://cdn.sqhk.co/tiruxugajo/hbeWihw/king_of_avalon_cheats_codes.pdfIn PDF document text
    • https://bemebedutor.weebly.com/uploads/1/3/4/6/134624352/8638944.pdfIn PDF document text
    • https://cdn.sqhk.co/genazeres/fMJRqE3/linear_equations_in_two_variables_word_problems.pdfIn PDF document text
    • https://cdn.sqhk.co/rozamulev/gejiiJd/41359010266.pdfIn PDF document text
    • https://cdn.sqhk.co/pijovowifil/0C9ViiJ/67265889137.pdfIn PDF document text
    • http://jekenufakewe.mypressonline.com/add_and_subtract_fractions_with_unlike_denominators_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabalero/aQidDij/8715843457.pdfIn PDF document text
    • https://cdn.sqhk.co/wanevakaxuma/gnPzgdy/pubonorawulibunexinin.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/xlujcGz/dead_ahead_zombie_warfare_wiki_enemies.pdfIn PDF document text
    • https://fabuduviwanor.weebly.com/uploads/1/3/4/7/134739750/9261535.pdfIn PDF document text
    • https://cdn.sqhk.co/tezizejaropu/hjbNpAn/ldoe_bunker_code_april_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/suxumeva/2dgjiby/79875662155.pdfIn PDF document text
    • http://paselon.getenjoyment.net/kofudexefebekedujut.pdfIn PDF document text
    • https://kawolusasemosu.weebly.com/uploads/1/3/5/3/135397741/xakudufatazi.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/I4aBidD/drag_racing_streets_cheats_ios.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/how_to_get_alexa_to_open_netflix_on_smart_tv.pdfIn PDF document text
    • http://tiwimifozukimu.medianewsonline.com/antonio_gramsci_subaltern.pdfIn PDF document text
    • https://cdn.sqhk.co/wemavutulow/jdL51Jp/jodoxani.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xofaxisenulomav.epizy.com/how_much_does_miner_make.pdfIn PDF document text
    • http://fuxuxasezid.atwebpages.com/brinkley_american_history.pdfIn PDF document text
    • http://kesufelitam.rf.gd/14501594081.pdfIn PDF document text
    • http://vimozav.epizy.com/definition_of_visual_communication.pdfIn 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001196a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196A 5760 bytes
SHA-256: 3472fea61a6c8a8ad91d85e78c7bc30c2ef299d7fce331f56858ae09ec10f812

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