Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fe32be2ab9d9395…

MALICIOUS

PDF

65.4 KB Created: 2021-02-22 08:47:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 72d6590740d1ee9e999f509c06819710 SHA-1: 71ab1f361d0da11227477f3ad30b00adc2cc7b2e SHA-256: 5fe32be2ab9d939553e1cd59103360774f7bff72fe0bf2dffc34470d89fc83ea
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('seumenha.ru') that is likely used for phishing or malware distribution. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates the document is designed as a link farm on disposable hosting, further supporting a malicious intent. The ML classifier and ClamAV detection strongly indicate malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=2002+dodge+dakota+rust+repair+panels PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4444646/normal_5fc9d9daca77a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490930/normal_602ad994d91a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376869/normal_6014bf5824e7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366630/normal_60246bcf30b1d.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/eihi1oo/38157289299.pdfIn PDF document text
    • http://kutakelipaxeb.22web.org/drug_metabolism_and_toxicology.pdfIn PDF document text
    • http://sodiwemewobigi.22web.org/tedufubaxixipeja.pdfIn PDF document text
    • http://bumisojef.iblogger.org/what_causes_caliper_piston_not_to_retract.pdfIn PDF document text
    • http://jijimaxugixu.22web.org/fusubovisisaneki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373271/normal_6006ce31a971e.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/X1oghif/83692008185.pdfIn PDF document text
    • http://zikapipumimapo.22web.org/fadebagepipafudefi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dozokefonusabo.rf.gd/pilifaneziduxari.pdfIn PDF document text
    • http://difugarulid.epizy.com/itil_raci_matrix_template_excel.pdfIn PDF document text
    • http://dexidije.epizy.com/zozopevukofox.pdfIn PDF document text
    • http://kotafonapajawut.epizy.com/gramatica_inglesa_avanzada.pdfIn PDF document text
    • http://zagaturatok.epizy.com/command_and_conquer_generals_apk.pdfIn PDF document text
    • http://wupatime.epizy.com/baboguvobaz.pdfIn PDF document text
    • http://gixojur.epizy.com/32677568262.pdfIn PDF document text
    • http://tunopezarogex.epizy.com/free_cashier_training_manual.pdfIn PDF document text
    • http://nipuxedexup.epizy.com/18707036773.pdfIn PDF document text
    • http://leriwegozeko.epizy.com/22192667643.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_off0000c186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC186 5368 bytes
SHA-256: 928d27d12acb6031140f2a5c0b877aacd63160351be724fc58f671a6376d5067
font_01_sfnt_off0000d3de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DE 10732 bytes
SHA-256: 70f08c0b1562a40f8af6cb3e67f2108f23918491fba0e4178f34d8c5cac53ddb

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