Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d63570ad66ffe6e…

MALICIOUS

PDF

89.5 KB Created: 2021-03-12 20:25:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 21a51f669935bf9475ff358864424b62 SHA-1: 26ef253464779a37f65c523e2eb5eff38fe096ec SHA-256: 0d63570ad66ffe6e34d5aa8c23ba084479e0714a7149f069a950d31a52d8afe1
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many pointing to disposable hosting and employing UTM parameters, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://midufefew.ru/strik?utm_term=how+to+cook+country+style+pork+ribs+in+electric+pressure+cooker PDF link annotation
    • http://megesodore.iblogger.org/ca_full_form_in_science.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/ijatjci/beach_buggy_racing_hacked_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/damukowabij/ia8jexi/walking_dead_quiz_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/lefuwaregew/c1POiej/easiest_skateboard_trick_to_learn_for_beginners.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483071/normal_60343878694b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422638/normal_6021a5e549480.pdfIn PDF document text
    • https://cdn.sqhk.co/manizamo/jjadlBf/5004641057.pdfIn PDF document text
    • https://cdn.sqhk.co/nadipozow/hqjd2Sf/wrestling_revolution_apk_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zunezafi/fEXq5mk/scentsy_scentsational_start_warmer.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/jfNKcVF/canon_print_inkjet_selphy.pdfIn PDF document text
    • http://purigoguwoz.22web.org/gukepojafakuwibirema.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/wulagisi/dynamic_tension_exercises_for_seniors.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/rukabotezokogiwib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07ce52b4-12b9-45a2-8f23-a04a32f730a6/51950234222.pdfIn PDF document text
    • http://xuramilipadig.rf.gd/matt_damon_the_informant_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d273ee4e-a1fc-4bf9-a799-28ae4380b71d/sodastream_source_black_white_with_flavours_source.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94134ec7-9446-456f-9cc7-c526d188fe8f/is_there_a_season_4_of_sword_art_online.pdfIn PDF document text
    • http://sonapap.rf.gd/4670765548.pdfIn PDF document text
    • https://s3.amazonaws.com/dexodekelaseki/danal.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/sezezef.pdfIn PDF document text
    • http://tijadosib.epizy.com/30694177908.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DA 4960 bytes
SHA-256: 2b4877cb7032ddc493fc8c291ed039489160b85ab1867e8144cf7d929c02b96c
font_01_sfnt_off000103cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CF 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off00010c5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5D 11100 bytes
SHA-256: e8e056f322bca7343f9cd855f1e52c4c1bf9eafcf01bb130f5a73dbbc7cf524c
font_03_sfnt_off0001326d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1326D 16660 bytes
SHA-256: 451a97a76e1cd188b335db18aa59b090969584b10ed985ec5dcca0b5cdb1d7ae
font_04_sfnt_off0001489e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1489E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361