Malicious PDF — malware analysis report

Static analysis result for SHA-256 d22bab6188f44cdc…

MALICIOUS

PDF

100.9 KB Created: 2021-02-26 22:55:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: dac24c86fed8064972cb85300eb59dd6 SHA-1: ee4166cdf160abe8560e3a320fd33bbbb8b3f1c9 SHA-256: d22bab6188f44cdc6c73ab9c323b66e7df4269f0fc8cba735cdfe5fb857855e9
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are used in a link farm pattern, suggesting a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to redirect users to malicious sites.

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=nicomachean+ethics+pdf+sachs PDF link annotation
    • http://phrensy.co/76810378923dsc0f.pdfIn PDF document text
    • https://cdn.sqhk.co/votezevon/fheQ09O/wamulogemesowigowupidix.pdfIn PDF document text
    • http://zenarajare.22web.org/asphalt_pavement_deformation.pdfIn PDF document text
    • http://podarokinsta365.site/metabolic_renewal_hormone_type_38qprx.pdfIn PDF document text
    • http://richmaya.site/antiderivative_of_cos22xfi3e8.pdfIn PDF document text
    • http://nogurufegu.mygamesonline.org/67184025281.pdfIn PDF document text
    • http://vaxisezawoged.scienceontheweb.net/gdpr_data_protection_policy_template_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/wifinalimow/ghRCsih/visualization_video_maker.pdfIn PDF document text
    • http://berilunowalaz.iblogger.org/67741577473.pdfIn PDF document text
    • https://cdn.sqhk.co/vijukifezu/ibjhevi/strike_team_hydra_gameplay.pdfIn PDF document text
    • http://zemegulobeka.iblogger.org/v_for_vendetta_trailer_2020.pdfIn PDF document text
    • http://beliyden.xyz/ap_assembly_elections_2019_candidates_lists0x82.pdfIn PDF document text
    • http://gutagige.sportsontheweb.net/star_and_marcos_guide_to_mastering_every_dimension_stump_day_edition.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
    • https://s3.amazonaws.com/zijivevip/52049849348.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/burtons_grill_nutrition_information.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/62635514932.pdfIn PDF document text
    • http://sawonuj.rf.gd/elgato_hd60_pro_pcie_game_capture_card.pdfIn PDF document text
    • http://wonanikapudidak.atwebpages.com/is_twilight_breaking_dawn_part_3_coming.pdfIn PDF document text
    • http://sekusasumoda.rf.gd/templates_and_inheritance_in_c_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/brotherhood_of_the_wolf_2001_free.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_off000142a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142A3 5024 bytes
SHA-256: 0936acaf7de1991644137e6a09f0baab7957ccac14930f9c4f4b95b61aba6990
font_01_sfnt_off0001538c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1538C 10504 bytes
SHA-256: 3de83b60250ac9e3d0c374334cd5990a253cce9099990dc09df1e96a0a141770
font_02_sfnt_off000177a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177A4 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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