Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7e7414b6ba6f032…

MALICIOUS

PDF

73.5 KB Created: 2021-03-29 18:32:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: ab2dc6532b53ce94546e9a004969e2b9 SHA-1: e79fe236ef69905d86c704cbde39d1ba4673ebc0 SHA-256: f7e7414b6ba6f03276e24925c3590565342cf4fa4d6bd24894b59b474a6d2a37
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs are likely used to redirect users to malicious websites or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://botokaw.ru/strik?utm_term=texas+a%2526m+meal+plan+pricing PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379387/normal_5fe64a5fc0e42.pdfIn PDF document text
    • https://regifevadep.weebly.com/uploads/1/3/4/4/134476302/vibizoxuwogi_vasowa_kifupagibun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378382/normal_5ff32467eb338.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovusig/fheh7jb/gexuregakipabukazapiju.pdfIn PDF document text
    • https://mixajogidevo.weebly.com/uploads/1/3/0/9/130969427/wevoderisab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365636/normal_605bb9432f268.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382197/normal_6023f72b83c36.pdfIn PDF document text
    • http://zootime.store/bram_stokers_dracula_lucy_werewolf726zy.pdfIn PDF document text
    • https://filewefoxu.weebly.com/uploads/1/3/4/7/134750201/ravofisodugis_luzejezipebimev.pdfIn PDF document text
    • http://cmbmarketing.agency/the_master_key_system_quotesffdu5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487423/normal_6060c6c287fb0.pdfIn PDF document text
    • https://fusidaxeda.weebly.com/uploads/1/3/1/4/131453850/3601603.pdfIn PDF document text
    • https://pejilajapife.weebly.com/uploads/1/3/4/4/134477767/af66363d94b.pdfIn PDF document text
    • http://teenagetutor.online/guidestar_nonprofit_lookupq69ri.pdfIn PDF document text
    • http://hdvideo.design/tukotezoxukeniyyx8p.pdfIn PDF document text
    • https://murovufusefafa.weebly.com/uploads/1/3/5/3/135331463/504404.pdfIn PDF document text
    • https://cdn.sqhk.co/bivosozos/eB2gOjh/liwonujuzemidilekode.pdfIn PDF document text
    • https://lujonojezim.weebly.com/uploads/1/3/4/5/134588784/23e5af11080ce.pdfIn PDF document text
    • http://telgrm.site/42236809105zz9o5.pdfIn PDF document text
    • https://zatitudebijozi.weebly.com/uploads/1/3/4/4/134460539/411dea.pdfIn PDF document text
    • https://durajonuz.weebly.com/uploads/1/3/1/3/131383269/gusale.pdfIn PDF document text
    • http://zomuregunaradu.iblogger.org/buwutofewajazokizib.pdfIn PDF document text
    • https://cdn.sqhk.co/wusosekame/bchbzhb/nesamekixemoki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pazovegisot.epizy.com/33215215406.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_off0000e335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE335 4568 bytes
SHA-256: 7bd1c7058c5171756eb70f2af4c60e653aafdbefcfe6976f307b5c818bd7410e
font_01_sfnt_off0000f2d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D2 10840 bytes
SHA-256: 069b15f28d52461be6d32b678c32f86721cb50af32154b9dc9dad293cb0459fd