Malicious PDF — malware analysis report

Static analysis result for SHA-256 954af5802e6c016c…

MALICIOUS

PDF

82.1 KB Created: 2021-03-19 19:15:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: dc59738b7d5c8842ab3d2af0d7551d98 SHA-1: eecd1b2596cc64aa80628adcc7e84cc748da4f18 SHA-256: 954af5802e6c016c8266284832bb21389e001666e1bb9025025055868da9340f
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 and link farms, suggesting a SEO-based phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity, likely aiming to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://ponafet.ru/strik?utm_term=how+much+is+a+2014+mustang+gt PDF link annotation
    • https://cdn.sqhk.co/gorisaburo/fbSdKjc/43821251439.pdfIn PDF document text
    • https://cdn.sqhk.co/fegojujor/fvXdMlc/nasij.pdfIn PDF document text
    • https://cdn.sqhk.co/nudofarus/Igeifhe/36328791750.pdfIn PDF document text
    • http://dirupomavi.iblogger.org/texas_6th_grade_math_textbook.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380887/normal_601fb6d0c3c32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375909/normal_6038cf19767b7.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/do9nhbd/43836705832.pdfIn PDF document text
    • https://sagopitura.weebly.com/uploads/1/3/1/1/131164573/ea5fec7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447646/normal_6027f04dd0962.pdfIn PDF document text
    • https://cdn.sqhk.co/gubujurit/n32hgP3/project_drift_battle_car_racing_games_online.pdfIn PDF document text
    • https://cdn.sqhk.co/kivutuzo/get9hcp/the_world_ends_with_you_anime_dub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413980/normal_60419301b8314.pdfIn PDF document text
    • https://xudinenudomojuv.weebly.com/uploads/1/3/4/3/134356320/zilitewapibakegaxo.pdfIn PDF document text
    • https://muwegejise.weebly.com/uploads/1/3/4/2/134265646/sufifulida-fositafevebuwe-rofoxoro-nasewimabo.pdfIn PDF document text
    • http://zodusen.22web.org/44161728303.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425921/normal_5fcd3501bf0b6.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://zisukuvi.atwebpages.com/is_chicco_fit2_worth_it.pdfIn PDF document text
    • http://medexode.atwebpages.com/camping_merit_badge_requirements_bsa.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_off0000f361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF361 5316 bytes
SHA-256: 3e53f26e96431a93241ebe40f51c56a37ba49048d2e1753e8f23bade9ab644dc
font_01_sfnt_off0001056b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056B 11892 bytes
SHA-256: 428464e490e8b01af025bbb45b9acf89f02b618b4dc7aa57cfea3f96ea70d53c
font_02_sfnt_off00012ce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE1 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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