Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ecdd7189d18b643…

MALICIOUS

PDF

67.6 KB Created: 2021-03-22 11:21:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5dad7d45bf95a02acbd2201d2e836f7 SHA-1: fb05df87415609b876d36666f52bef311d27f8d2 SHA-256: 1ecdd7189d18b643caa0a07913481ee10bc11354d967c8e4bcfd7a619fa7b4f5
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicates maliciousness. The document body, though heavily obfuscated, contains text related to 'gluten free baking course online' and 'wkhtmltopdf', suggesting a lure to disguise malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9761

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://gimoguvi.ru/aws?utm_term=gluten+free+baking+course+online
    • http://waparudadip.mywebcommunity.org/74094798234.pdf
    • https://cdn-cms.f-static.net/uploads/4460983/normal_605591bdeea38.pdf
    • http://lisifakus.66ghz.com/33743854101.pdf
    • http://surozofawowidom.scienceontheweb.net/71330466771.pdf
    • https://zakazorexan.weebly.com/uploads/1/3/1/4/131407051/pigixojupajurud.pdf
    • https://jukudedavat.weebly.com/uploads/1/3/0/9/130969580/6978041.pdf
    • http://kefets.xyz/suvujinedenanepofchzqh.pdf
    • https://zitupakunetod.weebly.com/uploads/1/3/0/7/130739751/1377017.pdf
    • http://ribininewo.22web.org/62467550372.pdf
    • http://smotrikino.fun/derivative_rules_sheetb13jp.pdf
    • http://ewwe.space/kepakomubovutiet5m8.pdf
    • https://dudepemak.weebly.com/uploads/1/3/4/7/134702006/lezivoxifufijinujix.pdf
    • https://cdn-cms.f-static.net/uploads/4387701/normal_6039b215a03e4.pdf
    • http://nususolajegak.iblogger.org/5928231691.pdf
    • http://dk-inc.xyz/jewixanqkyec.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://butorinowu.myartsonline.com/adobe_acrobat_viewer_apk.pdf
    • http://jogekofasi.rf.gd/synonyms_and_antonyms_complete_list.pdf
    • http://wixudilasajigil.rf.gd/94743428810.pdf
    • http://bekusisit.atwebpages.com/whirlpool_gas_range_parts_diagram.pdf
    • http://nirepuxakidogu.rf.gd/suzekobitaveret.pdf
    • http://kixugirudi.epizy.com/bacteremia_e_septicemia.pdf
    • http://zokitidekav.epizy.com/may_cause_miracles_review.pdf
    • http://gexegufikide.epizy.com/jegisawadeju.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fede.bin
6fb3552bfe95fe2e8eb97d14f461a17badcbe484e1b007111a1f3bb7392d9ae1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDE 5284 bytes

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