Malicious PDF — malware analysis report

Static analysis result for SHA-256 391bc6c946049b0f…

MALICIOUS

PDF

100.7 KB Created: 2021-03-09 17:28:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fe2b445dbdc8dfc0a08f0c068eec94f SHA-1: bd025b0c425829153c94da9c5c8dfb076b4a887f SHA-256: 391bc6c946049b0f7c85d51e54193dcf2ea6154100c0ff343e5ce6202ae98936
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://golowaki.ru/award?keyword=refraction+of+light+pdf+notes
    • https://cdn.sqhk.co/felinavaw/RUFjahf/motorcycle_wallpaper_iphone_11_cute.pdf
    • http://bikuribowe.22web.org/charice_pyramid_song.pdf
    • https://cdn-cms.f-static.net/uploads/4859805/normal_6036c441aa6fd.pdf
    • https://cdn-cms.f-static.net/uploads/4391605/normal_60354cffd3729.pdf
    • http://the-job.ru/adobe_reader_free_for_android0ok10.pdf
    • https://cdn.sqhk.co/jusulikipe/Kjitjjf/kumafelajavusateramob.pdf
    • https://cdn.sqhk.co/tezejikibus/elggjav/lalisuvogowore.pdf
    • https://cdn-cms.f-static.net/uploads/4481278/normal_6025fce97b919.pdf
    • https://cdn.sqhk.co/wapogade/jcp1Ajd/cloth_mask_diy_youtube.pdf
    • https://static.s123-cdn-static.com/uploads/4374860/normal_5ff9d0cf181db.pdf
    • http://wellwork.site/sitetekuwisulazokasipedz8oxd.pdf
    • http://erethiztzj.space/nebubeoopju.pdf
    • http://lnstagram-helping.live/778064346752yxz3.pdf
    • https://cdn.sqhk.co/rovifatira/ficy6lO/keforituwofobunigogete.pdf
    • http://kurs1.xyz/best_panasonic_phone_for_hearing_impaired2ess2.pdf
    • https://static.s123-cdn-static.com/uploads/4454966/normal_5fdfadc3af915.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://db6d201d-bdff-4648-9982-d9cfaac7639e.filesusr.com/ugd/98857b_a6b94104fcdd46f69323d78fd30bce9d.pdf?index=true
    • https://1639490a-f715-481e-9fb1-af38d332269b.filesusr.com/ugd/a59130_1d47a5661e1c4c8ba60a60c494b3baa9.pdf?index=true
    • https://f405dec1-7f90-4f4c-a861-5286f67d0127.filesusr.com/ugd/ab922d_9b0a9a7d4ac24823ab937def31f87c4e.pdf?index=true
    • http://mivetafo.epizy.com/introduction_to_anatomy_and_physiology_answers.pdf
    • https://s3.amazonaws.com/nisoxow/nobuzenegunibajiximo.pdf
    • http://movuzog.rf.gd/how_to_check_post_office_ppf_online.pdf
    • https://s3.amazonaws.com/juliziwojatige/27146660784.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_off00014fa3.bin
4cd91fa280fb2293087ba9e6da5d6989f9e99baf5675aafa6590ef9f7900ed9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x14FA3 5424 bytes
font_01_sfnt_off00016211.bin
7f57cc5cdbbd48759391ddbc658e27ded8212a29e408f660efcdcd168b862df5
pdf-font-stream PDF embedded font (sfnt) at offset 0x16211 10328 bytes