Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0226553ba65576b…

MALICIOUS

PDF

65.9 KB Created: 2021-04-03 11:20:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ae4769eabb33d8c3e41ae9caf19b7e2 SHA-1: b7812734ac5826d66ca77efbb293d4ccc6d489ff SHA-256: e0226553ba65576baa078263033673c10bf7022c35a9e3ca6cf96a2b25a3e0ed
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting a link farm or phishing attempt. The presence of embedded URLs and the overall structure indicate it's designed to redirect users to potentially harmful sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/aws?utm_term=bose+companion+3+series+ii+control+pod+replacement
    • https://cdn-cms.f-static.net/uploads/4458407/normal_603a11ad57ed9.pdf
    • https://cdn-cms.f-static.net/uploads/4418973/normal_6014afbd2e745.pdf
    • http://itravelgr.com/python_snake_game_without_pygamexo2pn.pdf
    • https://static.s123-cdn-static.com/uploads/4403685/normal_5fc9be6bd6f3f.pdf
    • http://majusenise.sportsontheweb.net/various_branches_of_accounting.pdf
    • http://fikosarodone.medianewsonline.com/suliforofagavabebafu.pdf
    • https://cdn-cms.f-static.net/uploads/4370064/normal_6017343fa66f8.pdf
    • https://cdn-cms.f-static.net/uploads/4409797/normal_600be1c5f089d.pdf
    • http://birebap.scienceontheweb.net/trigonometric_identities_solver.pdf
    • http://sabumow.mygamesonline.org/chemistry_lab_experiments.pdf
    • https://static.s123-cdn-static.com/uploads/4382613/normal_5fce27c2a578e.pdf
    • http://tixshopclub.fun/watch_dogs_bad_blood_trophy_guidewymu7.pdf
    • https://cdn-cms.f-static.net/uploads/4502698/normal_6057b3feb77cf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jeximojela.myartsonline.com/whirlpool_washer_drains_but_does_not_spin.pdf
    • https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_ae2652f14b62400abffe7eaf56a5a0d5.pdf?index=true
    • https://4123e755-5e7e-4fb8-b167-49ba90d37259.filesusr.com/ugd/fd3290_ff1f5620292e4917adba477ed0b39733.pdf?index=true
    • https://ec5c17a1-061e-4a2c-a9e6-b3561ba71229.filesusr.com/ugd/299074_ccdf5901b0034faab2aa39ade437ee2e.pdf?index=true
    • https://04a9e765-cf69-4035-9b9a-998d8fb4e692.filesusr.com/ugd/8c5016_9b2ca9991c2949bf935f92c64f9b2b51.pdf?index=true
    • https://7b8833d7-014c-4875-9c37-56438ffeb98a.filesusr.com/ugd/ccf209_5441fa95d1e84ee0a9d9e93169abfb26.pdf?index=true
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_7e776e21390b466eb53797b52f09fdbf.pdf?index=true
    • 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_off0000c3a8.bin
487164eaff8d2fe525d3f75f11f78a2c653c6c94fc89df37dd83e6753643ef68		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A8 5432 bytes
font_01_sfnt_off0000d605.bin
17019a67e5ccbae62b34f10cf85999968a49668b6c289accc7a51f71387d1534		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD605 10084 bytes

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