Malicious PDF — malware analysis report

Static analysis result for SHA-256 c18f644fe3d693d0…

MALICIOUS

PDF

152.6 KB Created: 2021-02-15 05:40:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 538260e301da2097971ad577a5c604c6 SHA-1: 179c229330c0a6c10e5ee3792e04cc879641ab45 SHA-256: c18f644fe3d693d0b660fdcfda079f94981f48093ffe5785de6863a67e5c9b69
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

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 0.8444

Heuristics 4

  • 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
  • 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://seumenha.ru/aws?utm_term=metro+map+singapore+pdf PDF link annotation
    • https://cdn.sqhk.co/lufasawo/rvjdifd/teppen_future_characters.pdfIn PDF document text
    • http://freedate18.xyz/fontspace_web_reviewn8vxp.pdfIn PDF document text
    • https://cdn.sqhk.co/linaxezo/gjbOfhe/vojoxuzovuxiwemawikoki.pdfIn PDF document text
    • https://cdn.sqhk.co/fovuxugo/gjjehdz/japanese_translation_app.pdfIn PDF document text
    • https://cdn.sqhk.co/jasamomedam/dhjfie3/vortex_cloud_gaming_review_2020.pdfIn PDF document text
    • https://pulezigo.weebly.com/uploads/1/3/4/6/134600697/7344588.pdfIn PDF document text
    • https://cdn.sqhk.co/bumogebiz/gdq1Kjg/shudder_movies_best.pdfIn PDF document text
    • https://tajagarajoj.weebly.com/uploads/1/3/0/7/130776182/nusodadu.pdfIn PDF document text
    • http://soinjaga.ru/tepetelinosazihc5ge.pdfIn PDF document text
    • https://cdn.sqhk.co/woxekivepi/ibYgeEA/77979971573.pdfIn PDF document text
    • https://cdn.sqhk.co/rotuzuwibi/eiggeuE/nipewovunejoramibon.pdfIn PDF document text
    • http://tesar-krd.ru/this_i_believe_essay_guidelinesg2wn7.pdfIn PDF document text
    • http://usejus.club/rakarubawaredisfh3n.pdfIn PDF document text
    • http://trokot-online.xyz/cydia_free_ios_12._1._4r272e.pdfIn PDF document text
    • http://natikolom.site/cabela_s_big_game_hunter_downloadzket9.pdfIn PDF document text
    • https://soxapibojewaw.weebly.com/uploads/1/3/5/3/135345372/1806540.pdfIn PDF document text
    • https://wukelefitifaka.weebly.com/uploads/1/3/4/8/134882985/pamufuloguluno.pdfIn PDF document text
    • https://cdn.sqhk.co/fowijuseziju/jhIjjac/motogp_racing_2018_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xurazegoba/ghjb0bL/2019853900.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/gcJM9ja/foosball_cup_world.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00021a8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21A8D 14708 bytes
SHA-256: f3b4a10dc8c2f487823f268d0988d2b80762a2b2d778554e0e8b54d7cbad7d44
font_01_sfnt_off000249dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x249DD 5336 bytes
SHA-256: 0f76fa1031d657bcb5e17f7f21eec02afaa2e1f113057e91738271248b32e21d

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