Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dab5388b4dad649…

MALICIOUS

PDF

76.0 KB Created: 2021-03-15 18:07:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 34886d60521714fcbf7aa2956013dc8e SHA-1: 2e4e93af44d973d9feb5a7149b5a6dc150a0da77 SHA-256: 6dab5388b4dad649a34c63c332ec7d869d58987a2b6c3e9dc77c0e2e5e964df4
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of numerous embedded URLs suggest the document's primary purpose is to redirect users to potentially harmful websites. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which could be used to facilitate these redirects or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://midufefew.ru/aws?utm_term=the+veldt+by+ray+bradbury+characters PDF link annotation
    • https://cdn.sqhk.co/viforoge/dHp9e0G/52513324772.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413563/normal_5ff6153d63d7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366040/normal_602d47bf0c3e3.pdfIn PDF document text
    • https://cdn.sqhk.co/tavolimogid/Fgix90Y/81193676954.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476010/normal_603ce6d8786b8.pdfIn PDF document text
    • https://cdn.sqhk.co/pesasotiro/LjewvfM/sweetstar_songs_download_music_downloads.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375690/normal_60495abf26a86.pdfIn PDF document text
    • http://toworugesolur.getenjoyment.net/best_cfop_algorithms.pdfIn PDF document text
    • https://cdn.sqhk.co/ganidabizi/9elhDig/fun_goal_tracker.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://goxafebo.myartsonline.com/law_of_acceleration_sample_problems.pdfIn PDF document text
    • http://zujuxeropide.rf.gd/11353492893.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/15653729377.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/423cbfbd-81a8-4c0b-a3f0-64c32d20e66b/uppababy_vista_v2_jordan_baby_bunting.pdfIn PDF document text
    • http://momosetid.rf.gd/turbocad_mac_user_manual.pdfIn PDF document text
    • http://vewawisu.onlinewebshop.net/physics_formulas_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fff38e78-3fe2-4793-992b-37b3266f2f17/graphs_of_other_trigonometric_functions_worksheet_answers.pdfIn PDF document text
    • http://nabimugupifasif.epizy.com/97328051253.pdfIn PDF document text
    • http://gixarewujedel.atwebpages.com/that_would_be_great_meme_office_space.pdfIn PDF document text
    • http://bizedesaxifu.onlinewebshop.net/dawoodi_bohra_marsiya_download.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/pokuzonaxexinan.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_off0000eb3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3C 5280 bytes
SHA-256: e66f5ca258016b1f2c712d7b0a465f91ce0cc9c86f329a981fd13a1b8450ae12
font_01_sfnt_off0000fd27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD27 10392 bytes
SHA-256: cb1be769b3021a4849ac3ae902c466c6d91b115bb0e252d31635d13848e09a45

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