Malicious PDF — malware analysis report

Static analysis result for SHA-256 c12a401a27ce4008…

MALICIOUS

PDF

96.6 KB Created: 2021-03-21 05:07:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a7dc5e961f85acef58275fa3474533a SHA-1: 60327b1439bd651d7e383c297c46383e83dfc3d9 SHA-256: c12a401a27ce40087721033aee75818bc5ba689740a0b3e8fb7c77c94c9adbc4
154 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO poisoning and phishing. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links designed to manipulate search engine results. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the presence of many external URLs suggests the document is designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9656

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://druttle.ru/award?keyword=islamic+banking+system+in+bangladesh+pdf
    • https://cdn.sqhk.co/neratimo/dTJfhaK/62827382519.pdf
    • https://cdn.sqhk.co/gabixeme/gfhagf0/sabururaxilomezeforemeniv.pdf
    • http://funiwigurogamu.iblogger.org/72817266532.pdf
    • https://nuvomananakoleg.weebly.com/uploads/1/3/1/4/131453817/nozuwekijirom.pdf
    • https://cdn.sqhk.co/renosopezare/tifV8hj/9181296707.pdf
    • https://static.s123-cdn-static.com/uploads/4471082/normal_5ff6cec33c3f6.pdf
    • https://cdn-cms.f-static.net/uploads/4458852/normal_5fdac636ae916.pdf
    • https://fopilifufisi.weebly.com/uploads/1/3/6/0/136055159/9651948.pdf
    • https://cdn.sqhk.co/lonubugogere/hEhBROO/lara_croft_relic_run_apk_mod_gems.pdf
    • https://cdn.sqhk.co/minamojazi/hfhwiju/mindshare_agency_indonesia.pdf
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/gupasigoz.pdf
    • https://cdn.sqhk.co/dedenijikal/hAqg6xL/jujudijaruzafome.pdf
    • https://cdn.sqhk.co/dixejetafap/6a8hijf/zunoma.pdf
    • http://natotakujoriw.iblogger.org/33139432976.pdf
    • https://cdn.sqhk.co/tebefaravuz/jZrijUO/affirm_walmart_contact_number.pdf
    • https://cdn.sqhk.co/laruxibut/jeeJV52/20654220061.pdf
    • https://cdn.sqhk.co/lesasafo/ighe9ib/vaside.pdf
    • https://cdn-cms.f-static.net/uploads/4401983/normal_6052faeb4d6a4.pdf
    • https://cdn-cms.f-static.net/uploads/4482023/normal_604f3fbb56c0c.pdf
    • https://static.s123-cdn-static.com/uploads/4456165/normal_5fee738043326.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jewojov.epizy.com/the_raven_poem_meaning.pdf
    • http://juwozevukiri.rf.gd/verbos_irregulares_en_ingles_traducidos_para_imprimir.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001721c.bin
cc9f8ebab2092723c37922e6c45f06b307c67530b33c31d659fe5b20b449dad1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1721C 5716 bytes

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