Malicious PDF — malware analysis report

Static analysis result for SHA-256 9514bed91d56344a…

MALICIOUS

PDF

72.0 KB Created: 2021-02-16 11:16:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 80248fe48b9594d55c8d1837ece1b89f SHA-1: 4af8c0ccfa7beeb15b04095be9e978b7c88ef2fd SHA-256: 9514bed91d56344a47fd07880ab2c8b17c647e954fa1fb6757f243b5731300c1
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and heuristics indicate it is a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/strik?utm_term=reader%2527s+digest+fix+it+yourself+manual+pdf PDF link annotation
    • http://bostpolamos.site/funny_car_racing_shirtsmc0u0.pdfIn PDF document text
    • http://lnstagramverifiedbadge-media.com/watchman_nee_real_namecinnn.pdfIn PDF document text
    • http://vefefex.iblogger.org/2278399249.pdfIn PDF document text
    • https://cdn.sqhk.co/ridefapagol/Hjbdihg/59974927134.pdfIn PDF document text
    • http://biwonomapul.iblogger.org/favomo.pdfIn PDF document text
    • http://kotonopiz.iblogger.org/disciform_keratitis_zoster.pdfIn PDF document text
    • http://gezilobogobig.22web.org/47134266907.pdfIn PDF document text
    • https://cdn.sqhk.co/pobopuwubox/gjfc7ys/83714025878.pdfIn PDF document text
    • http://pl50off.info/tron_light_cycle_for_saleenh4x.pdfIn PDF document text
    • http://accface.in/best_travel_guides_for_paris_franceomhfc.pdfIn PDF document text
    • https://cdn.sqhk.co/mobirewin/Wgituic/driving_in_luxury_car_simulator_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nifukugobu.rf.gd/34934859617.pdfIn PDF document text
    • http://xatosizukav.epizy.com/88681935517.pdfIn PDF document text
    • http://zadabodemuliju.epizy.com/42560846412.pdfIn PDF document text
    • http://lerofisa.epizy.com/manually_add_workout_apple_watch_4.pdfIn PDF document text
    • http://rezumasalimod.epizy.com/borojexaloxigujafilono.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7B 5452 bytes
SHA-256: 22c6563c8d60cc98b06247b24242d8599191467c3c03e10c67996d80d29e775a
font_01_sfnt_off0000df04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF04 11848 bytes
SHA-256: a1348388123e11158dad04cbb6ef53f9d2311655badecc3880a51c6995678178
font_02_sfnt_off00010471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10471 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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