Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dfc0a2ab4197344…

MALICIOUS

PDF

73.9 KB Created: 2021-06-11 10:41:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 556e682cc01ab5d99536c81ad52715e6 SHA-1: f8a01089620fa75ade42dac4631bcc553871262b SHA-256: 7dfc0a2ab4197344ca0679b7ae36b9bc525106a711c680c99de74899862dc41f
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, including one to 'crysiq.ru' which is associated with a 'pokemon pocketown game download' lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crysiq.ru/pbw?utm_term=pokemon+pocketown+game+download
    • https://nogikukejigili.weebly.com/uploads/1/3/0/8/130873965/vonopefupipetumumin.pdf
    • https://cdn-cms.f-static.net/uploads/4531523/normal_5fd0a252807eb.pdf
    • https://reravonox.weebly.com/uploads/1/3/1/8/131856904/5206254.pdf
    • https://cdn-cms.f-static.net/uploads/4449181/normal_600d278663b1c.pdf
    • https://vudonifudiw.weebly.com/uploads/1/3/2/7/132741109/ronuwoxob_bevij_wudigesabelozo_nitofodimu.pdf
    • https://nenovalo.weebly.com/uploads/1/3/2/7/132712003/wiromuxipuxiromikomo.pdf
    • https://lozagazol.weebly.com/uploads/1/3/4/2/134266804/tilonolevet.pdf
    • https://pavimukafimedab.weebly.com/uploads/1/3/1/4/131483282/baxemowapemorewa.pdf
    • https://static.s123-cdn-static-d.com/uploads/4412158/normal_60b680bd88b31.pdf
    • https://cdn-cms.f-static.net/uploads/4378604/normal_600a9d93709f3.pdf
    • https://tivepikilusu.weebly.com/uploads/1/3/4/7/134759048/texogebeketime.pdf
    • https://vokijovagugudis.weebly.com/uploads/1/3/0/7/130776016/7225974.pdf
    • https://cdn-cms.f-static.net/uploads/4369655/normal_604f1f4ed1fc8.pdf
    • https://jalamipitifem.weebly.com/uploads/1/3/0/7/130738892/3586233.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://matajin.pbworks.com/f/89005439247.pdf
    • http://kevuxezedila.pbworks.com/f/edgenuity_ap_world_history_cumulative_exam_answers.pdf
    • http://godekazonigi.pbworks.com/f/how_to_get_free_robux_no_anti_bot_verification.pdf
    • http://dokajawema.pbworks.com/f/movies_to_watch_before_avengers_endgame_in_order.pdf
    • http://pefumugat.pbworks.com/f/what_is_the_difference_between_1010_and_1020_steel.pdf
    • http://bobiginokemo.pbworks.com/w/file/fetch/144724611/2961143215.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e033.bin
d365eb2a1cf94ad6a2b27d5889e933d3e814585b977e4451b598fd2a2bf8dec9
pdf-font-stream PDF embedded font (sfnt) at offset 0xE033 5276 bytes
font_01_sfnt_off0000f22d.bin
f1388e442ca03c1c1050e9fb7d0346127f4ca3742361cd24d5b0c65837920476
pdf-font-stream PDF embedded font (sfnt) at offset 0xF22D 11344 bytes