Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fa2a0b21679bd01…

MALICIOUS

PDF

75.5 KB Created: 2021-02-11 22:45:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: a4f68b9f804aa90c3d249b3f90e5cd90 SHA-1: 155d0bd3d678ea600e023eb0ed959cc322587536 SHA-256: 7fa2a0b21679bd01147b2c9e8d7c7dae82fc3dc75c8fa8ee287e4eedb0716f99
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many of which point to disposable hosting and are used in a link farm, suggesting a phishing or malware distribution scheme. The presence of a URL with a 'download the amazing spider man apk mod' UTM term further supports the lure of downloading a potentially malicious application.

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/123?utm_term=download+the+amazing+spider+man+apk+mod PDF link annotation
    • http://busurman.space/62520282128jxmap.pdfIn PDF document text
    • http://consequences.space/alternative_assessment_strategies84noc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402944/normal_5ffef06ee530d.pdfIn PDF document text
    • http://ririkizijudiwo.iblogger.org/aatish_film_dialogue.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/fP7iegc/lyrical_photo_status_mod_apk_without_watermark.pdfIn PDF document text
    • https://cdn.sqhk.co/tedisebufen/ljdjcLO/85381054638.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/jijgLgg/65099576805.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368506/normal_5ffa1d5738e29.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/vjbK3ps/zugipewudatokilek.pdfIn PDF document text
    • https://cdn.sqhk.co/nafolekuge/X2dEHge/super_jake_s_adventure_descargar.pdfIn PDF document text
    • http://e-devletodeme.net/turbobit_zaman_hilesiedau0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408873/normal_5fd2a7e43e012.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415769/normal_5fe085dfe247d.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
    • http://wekazuvenasiwuf.epizy.com/outlook_email_pictures.pdfIn PDF document text
    • http://zubeleboju.epizy.com/game_aggressors_of_dark_kombat.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_off0000dbba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBA 5368 bytes
SHA-256: e8d86b29486277dc651fc7a0c5434eac7697b537ab903dfb9b51ccb8ae0cde1d
font_01_sfnt_off0000ede5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE5 10812 bytes
SHA-256: 06c559e3329dfa017a444bb614665480d767e0de84deed7f3610ea01aba2717f
font_02_sfnt_off000112c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C7 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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