Malicious PDF — malware analysis report

Static analysis result for SHA-256 5513d162781a99b0…

MALICIOUS

PDF

151.3 KB Created: 2021-03-14 09:06:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: bfd4637d8be78721a1af348c4fa7ea5c SHA-1: 4439b562b43cfc46e3943272d75215c60774155b SHA-256: 5513d162781a99b0ba2ceb5dbe772b309dd4d8ae61ddeb000748e164fff9f180
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm PDF. It contains numerous external URIs pointing to various domains, suggesting an attempt to redirect users to potentially malicious content. The PDF structure and embedded links are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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
  • 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://seumenha.ru/strik?utm_term=constructionist+view+of+gender PDF link annotation
    • https://libesomed.weebly.com/uploads/1/3/4/9/134904451/zudoxazonobogum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472188/normal_5fdeb5151fe90.pdfIn PDF document text
    • http://nibodilakiwote.22web.org/alexander_the_great_dog_names.pdfIn PDF document text
    • http://sevagawos.getenjoyment.net/eritromicina_suspenso_bula.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxosutuku/elzRlw6/5928459594.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408004/normal_600bf85f7bf6b.pdfIn PDF document text
    • http://temopiju.iblogger.org/wanaz.pdfIn PDF document text
    • http://nanebaxexob.getenjoyment.net/foxupabipegofatajevivi.pdfIn PDF document text
    • https://kekisuganuzab.weebly.com/uploads/1/3/4/7/134721312/4ce60b2963.pdfIn PDF document text
    • http://pazolozul.mypressonline.com/bankersadda_syllogism_download.pdfIn PDF document text
    • http://tofugezupeb.mygamesonline.org/critical_care_transport_field_guide.pdfIn PDF document text
    • https://kuvekimat.weebly.com/uploads/1/3/6/0/136052924/5137601.pdfIn PDF document text
    • https://cdn.sqhk.co/jakufomego/jbijhgj/idle_fish_aquarium_android_1.pdfIn PDF document text
    • https://lusugola.weebly.com/uploads/1/3/4/5/134599647/tagugos_piwameju.pdfIn PDF document text
    • https://cdn.sqhk.co/fobonelaga/jd7Argi/roblox_verification_not_working_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://matufuw.rf.gd/39663547088.pdfIn PDF document text
    • http://vijijowop.epizy.com/tosazuxanez.pdfIn PDF document text
    • http://kabemetuva.rf.gd/anet_a8_plus_vs_ender_3_pro.pdfIn PDF document text
    • http://gumofiwulova.epizy.com/gixuvutuwikajeza.pdfIn PDF document text
    • http://vulebodifoguvar.epizy.com/19697387291.pdfIn PDF document text
    • http://fojodopid.rf.gd/traductor_ingles_espaol_online_gratis.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0002143e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2143E 5004 bytes
SHA-256: 7e70911cca6af076381dc792ed8b954795deecfcded27d182c6d6e52b1c4fcd8
font_01_sfnt_off0002256c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2256C 12248 bytes
SHA-256: ea720e5390a9d76ad960ec5ba00d4e2bf3aaefc66c49ce71bef2b04068096c24

Open this report in the interactive analyzer, or submit your own file for analysis.