Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fbc0eef4821f4f9…

MALICIOUS

PDF

74.6 KB Created: 2021-04-06 20:57:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c5464f25443bc4d5ca03f7badde07488 SHA-1: 72c5f566d80203291e5979b2e5e6fa19bd52b2ba SHA-256: 0fbc0eef4821f4f9c1c31c4cc4b761c0ab2211bb96a5e82a3b713b08cdff9872
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of external URIs and link farm heuristics further supports this, suggesting the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9808

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://pelibifir.ru/strik?utm_term=simple+definition+of+enthalpy+change+of+neutralisation PDF link annotation
    • https://nebolizeluxofid.weebly.com/uploads/1/3/0/8/130874408/fe73ea8f1.pdfIn PDF document text
    • http://ourfutures.space/download_subway_princess_runner_java_gamenup36.pdfIn PDF document text
    • http://tameeniraq.com/que_es_picaporte_de_la_puertaeap2e.pdfIn PDF document text
    • http://fbdirect.site/58823819752yf9jf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459628/normal_604843a8b960c.pdfIn PDF document text
    • http://fb-pageunderreview.com/world_at_arms_gamel76xn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470982/normal_5fcaa1b62e553.pdfIn PDF document text
    • https://nodifolosorak.weebly.com/uploads/1/3/4/7/134758422/tasisivawuxofonomozi.pdfIn PDF document text
    • http://rocketdocs.us/zuvatimidozepunajezimener6y728.pdfIn PDF document text
    • http://stankovit.ru/how_to_get_a_free_immigration_lawyer5esud.pdfIn PDF document text
    • http://pressit.space/85345664759z0v6y.pdfIn PDF document text
    • http://evatopshop.xyz/comprehension_worksheets_for_2nd_gradex4dh6.pdfIn PDF document text
    • http://elinekici.online/popumuxovesegomonivufpxc4.pdfIn PDF document text
    • http://rewita.fun/sony_bdp-s590_lockedllhue.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463264/normal_6005268acbc6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388060/normal_601061f3a5d8c.pdfIn PDF document text
    • http://abwaab.su/illuminated_manuscript_font_generatorjyati.pdfIn PDF document text
    • http://espacecmb.xyz/molisirama3f.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zukogi/87071242619.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/how_do_i_connect_my_canon_mg3600_printer_to_my_computer.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF920 1560 bytes
SHA-256: 3480c55784b56b30103e7ce104023669119397bb16b4866b09a90a8ad0bb0338
font_01_sfnt_off0001011d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011D 5776 bytes
SHA-256: 6c2bd5c1dd68f359b732a3840302534f75b6dbad7b41fd8b489de74c99ff9ad1

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