Malicious PDF — malware analysis report

Static analysis result for SHA-256 86d1be73856418d0…

MALICIOUS

PDF

69.4 KB Created: 2021-02-18 01:11:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3ee16171d11f6b738d83568d56120b03 SHA-1: 5665e6a5a9831a0dd74a4197e26a185fe73b3675 SHA-256: 86d1be73856418d04dd647067854b54c51811c27843006d18576b892d3402e96
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/wix?keyword=super+fnaf+world+rpg+apk'. This URL is presented as a download for a game, indicating a phishing or social engineering attempt. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/wix?keyword=super+fnaf+world+rpg+apk In PDF document text
    • https://cdn.sqhk.co/bitomasijelo/iihf4gc/history_of_religion_in_american_politics.pdfIn PDF document text
    • https://cdn.sqhk.co/fubafonu/heQp6ia/klondike_solitaire_download_for_mobile.pdfIn PDF document text
    • https://cdn.sqhk.co/devuzemalut/Yljiyig/meteor_shower_tonight_april_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/puzadowoke/ghjTmQu/gbox_tv_remote_app.pdfIn PDF document text
    • https://cdn.sqhk.co/bafiweba/XVihijR/zivexobefiva.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/igYPDqp/water_park_picnic_spot.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/hjW8geL/retro_wear_t_shirts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486521/normal_5fd33e837505e.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/bitizopovopaso/dbt_worksheets_for_borderline_personality_disorder.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/why_do_barnacles_form_on_turtles.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/bus_stop_method_division_worksheet_year_4.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/zoxisujigijomarule.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/logo_design_template_3d.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/1253103077.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/kazogumenakuvavozuw.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_off0000c9cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9CC 5044 bytes
SHA-256: d5d696bfe76e6f5a5be176a751f3f5d8ee7a0d2e5dbc0e05aa71635924703d83
font_01_sfnt_off0000db0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0D 9224 bytes
SHA-256: f0b4918898010b9bf68538c1f77e91a096041361ce25b4d30a627ae6a72f52a8
font_02_sfnt_off0000faa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA6 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378