Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce6cb2ba00e02ba6…

MALICIOUS

PDF

78.3 KB Created: 2021-02-15 00:48:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 01360f8c41d1347e648b0933cff648a7 SHA-1: 5327118296e22e5132c46ea06118e20be731edb8 SHA-256: ce6cb2ba00e02ba644e3e3160e6d6259d0f7d45f3f1d092b4fd56c925d7de042
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, which is characteristic of SEO link farms used for malicious redirection. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of external URIs and link farm heuristics strongly suggests an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=abiotic+factors+in+coral+reef+biome PDF link annotation
    • https://cdn.sqhk.co/gavezexu/LGjb0hd/polynesia_adventure_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/rivitovolu/OjijiaV/warplanes_ww2_dogfight_mod_apk_unlock_all_planes.pdfIn PDF document text
    • https://cdn.sqhk.co/mewixamok/dchi9cw/highway_closures_due_to_fires.pdfIn PDF document text
    • http://1cats.space/buvenutudixotebzaou.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5fdb216ca786c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409628/normal_60160f57eb3e8.pdfIn PDF document text
    • https://cdn.sqhk.co/napumefu/UFghjj5/play_texas_holdem_poker_for_free_no_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kosojilufut/EFgijiq/87026007829.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496816/normal_5feb91788baf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469353/normal_600f2f196d734.pdfIn PDF document text
    • http://persequenteamsohbet.com/95640582086nlhhy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403674/normal_5fef456c2ee83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379605/normal_5fea381fcd3d7.pdfIn PDF document text
    • http://trells.space/spider_stickman_rope_vegas_crime_city_herodjoeh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463272/normal_602123f973a33.pdfIn PDF document text
    • http://businessmentality.com/audience_report_rai_3o762p.pdfIn PDF document text
    • https://lolorude.weebly.com/uploads/1/3/0/7/130775760/2392439.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF766 5156 bytes
SHA-256: 6f137e881bb6bded4397950c666cc5b292e55d5944e7e5f5bbad30334fe4df1c
font_01_sfnt_off000108e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E3 10240 bytes
SHA-256: d4ed275e431b012624268848b18d5e39fef45620ce2e1fe2ffbbfd9db172ab4f

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