Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b86fa4cc67d2300…

MALICIOUS

PDF

69.5 KB Created: 2021-03-19 15:48:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4b20cba8d8ee176f1ec12848e41f93d SHA-1: 07a08dc14a0d433de1e98e7df72bbf3fd4b2df7a SHA-256: 6b86fa4cc67d2300598333d6932714cfb7d1cd3b349decc56623768ee149de87
124 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, with one pointing to 'jumiwimov.ru', suggesting it may be used to redirect users to phishing sites or download further malicious content. The PDF's structure and embedded links are indicative of a link farm, often used to obscure the true destination or to distribute malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7694

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://jumiwimov.ru/award?keyword=bpsc+65th+question+paper+pdf+download
    • https://cdn.sqhk.co/rowavarop/ijcidyc/55002157544.pdf
    • https://cdn-cms.f-static.net/uploads/4489844/normal_60164cd0001d0.pdf
    • http://kufafukedexepix.mygamesonline.org/vitamix_blender_container_replacement.pdf
    • https://cdn-cms.f-static.net/uploads/4450141/normal_604adb408fe91.pdf
    • https://cdn.sqhk.co/duditizonut/RD2mGia/bupebijasaxikigobek.pdf
    • http://joxugeki.22web.org/where_is_the_best_place_to_put_a_magnetic_tracker_on_a_car.pdf
    • https://cdn.sqhk.co/joxesinejag/AAfSwjg/15628594995.pdf
    • https://static.s123-cdn-static.com/uploads/4371025/normal_6006f300bbcb7.pdf
    • https://cdn-cms.f-static.net/uploads/4445733/normal_60191eec39dce.pdf
    • https://cdn-cms.f-static.net/uploads/4467027/normal_603716c435a19.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ce83042b-5faf-46b5-bcbb-9b4d05ec7d33.filesusr.com/ugd/a31856_36f92fe1143b4e42a2a66ace969a2a59.pdf?index=true
    • http://tofujuwo.onlinewebshop.net/fijegivinekadilarajowugos.pdf
    • http://xogijowag.onlinewebshop.net/safewatch_3000_change_master_code.pdf
    • http://nusazonawo.epizy.com/kamunivez.pdf
    • https://s3.amazonaws.com/zalomi/88385797926.pdf
    • http://peledopa.myartsonline.com/45773994038.pdf
    • http://sidepojedava.myartsonline.com/bumozubiwirala.pdf
    • http://tejutixofefadi.rf.gd/xenemunimoza.pdf
    • https://s3.amazonaws.com/veraxawewib/vepisulanipa.pdf
    • http://zagizub.rf.gd/how_to_work_a_danby_dehumidifier.pdf
    • https://s3.amazonaws.com/wuzalugiseto/57287215355.pdf
    • https://s3.amazonaws.com/lijopavexanuse/18219368470.pdf
    • http://jidibavozajo.epizy.com/free_organizational_chart_templates.pdf
    • https://144c9d4d-401b-437b-b89f-6a5816d7da47.filesusr.com/ugd/cd33f5_18fe58e32f1249ce897a8e6176d2aad9.pdf?index=true
    • https://746420f6-3007-491b-ba72-fd43be5094e5.filesusr.com/ugd/277b62_4baeb900e6c04eb4b6e6f16df2e6f27d.pdf?index=true
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f02a.bin
18f642180d56cf0bcbde2087bc568fb8e3d64fc8f2e0fc6bd1a839078ddd0751
pdf-font-stream PDF embedded font (sfnt) at offset 0xF02A 5788 bytes