Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ab35d98d30d359…

MALICIOUS

PDF

96.9 KB Created: 2021-04-06 08:25:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 240b0c27a14d1f791c2ff2422c5c12fa SHA-1: 5f508108119519acd2b83a17dcf5a71cc1f2278c SHA-256: 01ab35d98d30d3592d7a4b48dc2e7951dd1fd82d2a238ac836d15254dbc56948
126 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on disposable domains and flagged as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. The embedded URLs, such as 'https://jumiwimov.ru/award?keyword=asmaul+husna+pdf+versi+nu', are likely used to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://jumiwimov.ru/award?keyword=asmaul+husna+pdf+versi+nu PDF link annotation
    • http://reduslim-official.website/sch_sinh_hc_campbell_ting_vityqpn0.pdfIn PDF document text
    • http://viewcreditscore.info/837844821743rhpd.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvaworizon/gcyAhi7/chess_engine_free_software.pdfIn PDF document text
    • http://vovavipegum.getenjoyment.net/83410851675.pdfIn PDF document text
    • http://biweekamnf.com/job_interview_questions_to_ask_a_supervisor_candidategquzc.pdfIn PDF document text
    • https://cdn.sqhk.co/mapexuze/XRDOvvW/rovadusejowajim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476569/normal_6016b34147b13.pdfIn PDF document text
    • http://regsenatvumen.website/89832205144el43l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379369/normal_5fd13a85e832e.pdfIn PDF document text
    • http://arenda-comp.space/bakra_eid_mubarak_images_hd_2019yyf7k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453553/normal_5fd31130d25e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_6044d0a3d2ba9.pdfIn PDF document text
    • http://pumorux.medianewsonline.com/kavadexamuponejomareled.pdfIn PDF document text
    • https://cdn.sqhk.co/riwifesineji/gdjahc0/45823706204.pdfIn PDF document text
    • https://cdn.sqhk.co/nejisakatok/b8vqkhb/7507679995.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410679/normal_5ffc1936e8ec4.pdfIn PDF document text
    • https://cdn.sqhk.co/pozazoji/iatnjeZ/santa_run_game_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://aa700e4b-9450-4a85-8b7e-8c92ffe47626.filesusr.com/ugd/de972d_6d6124da74844588985be9d420804284.pdf?index=trueIn PDF document text
    • https://2061f665-9309-41a6-981d-137229ee7e60.filesusr.com/ugd/eb2fe6_77fc67d8633c4c1fa6888454bedc7e12.pdf?index=trueIn PDF document text
    • https://eee7329a-c4d5-4508-a8fd-a8ba515f7d9f.filesusr.com/ugd/5ed802_4097b83c517c40a593e542fc727472a0.pdf?index=trueIn PDF document text
    • http://tofujuwo.onlinewebshop.net/craftsman_air_compressor_rebuild_kit.pdfIn PDF document text
    • http://wudemexa.myartsonline.com/96778345217.pdfIn PDF document text
    • https://4123e755-5e7e-4fb8-b167-49ba90d37259.filesusr.com/ugd/fd3290_829f5c0a3451428bbaa278f778699e3f.pdf?index=trueIn PDF document text
    • http://kimoviranonaf.onlinewebshop.net/fewojawedu.pdfIn PDF document text
    • https://7be326e9-a1fd-4761-a84c-83c904220737.filesusr.com/ugd/37e945_8aebbba824a24de795e35f105b00c666.pdf?index=trueIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00013ffb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13FFB 30616 bytes
SHA-256: 92f96adcbc1c47c54318d46c1e0635c9610ba4736010b9f8b0bd33abfaa2f7ff
font_00_sfnt_off00010958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10958 5332 bytes
SHA-256: c95b740c8d55ebab22e62f0985467ee530aacdc9ab41b4c666ffc0fd769596e6
font_01_sfnt_off00011b55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B55 11084 bytes
SHA-256: 5f543c24a1b596e86791c81c7faa1c8ffe370a89a9f18c57b4e0732c6adbf20c