Malicious PDF — malware analysis report

Static analysis result for SHA-256 33b9ed925ce1a6c5…

MALICIOUS

PDF

73.6 KB Created: 2021-02-24 16:54:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94e1c61e751b58bb9e0fa9c180663795 SHA-1: 8eea55dddcd9519904e8c06a49a7e73f06c711c9 SHA-256: 33b9ed925ce1a6c52843f5612001dec9f01ec439375df7eb92b8e6066a4f9615
154 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are generated SEO-style links pointing to PDF files on various domains. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting a malicious intent to distribute content or redirect users. The ML classifier and ClamAV detection further support its malicious nature. While no scripts were explicitly extracted, the presence of external links and the PDF structure strongly suggest an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9803

Heuristics 4

  • 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-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
  • 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://crophysi.ru/award?keyword=the+memory+book+by+harry+lorayne+and+jerry+lucas+pdf+free
    • http://ideaita.fun/nifevusowiruxoduli21e3h.pdf
    • https://zofekumu.weebly.com/uploads/1/3/4/7/134741387/ranadaparemoguwe.pdf
    • http://azorocheat1.xyz/bukawimobogigotiral648z.pdf
    • http://mebelintera.ru/soguvarevodaruwotazou2kwb.pdf
    • http://xtreme-sport.ru/disney_sorcerer_s_arena_best_characters_july_2020qg7dk.pdf
    • https://kitozegukelod.weebly.com/uploads/1/3/6/0/136056839/vijarupivamozur-xulebuzu.pdf
    • https://lewesasegejawu.weebly.com/uploads/1/3/5/3/135315787/guzatokewokokek.pdf
    • https://vutakajar.weebly.com/uploads/1/3/4/8/134896426/mireregamilu_xofikusama_gorupalixaro_fevaner.pdf
    • https://tutamedu.weebly.com/uploads/1/3/1/8/131856186/falixerakunuteximife.pdf
    • http://help-nanny.site/vipegiletesemob6zqph.pdf
    • https://julavatevimire.weebly.com/uploads/1/3/4/6/134669339/2731713.pdf
    • https://cdn.sqhk.co/zinoliwomi/jbgegdO/paycell_kart_limiti.pdf
    • https://cdn.sqhk.co/kenoramof/hiz4Nhe/how_to_pass_pt_test_in_2_weeks.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kuxuxemu/funny_cartoon_hd_images.pdf
    • https://s3.amazonaws.com/zumezeviwakiz/8374760884.pdf
    • https://s3.amazonaws.com/vesubodufisi/36410724938.pdf
    • https://s3.amazonaws.com/minegikukovel/zedodifixujufise.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111e9.bin
340e13cc630585b50af00b589ad3944ff3baded6e5f705471c3631df27c2fa4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111E9 5728 bytes

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