Malicious PDF — malware analysis report

Static analysis result for SHA-256 aabec3f1d5e92b93…

MALICIOUS

PDF

83.4 KB Created: 2020-12-19 21:40:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 50e6cac6e003358c697a33f7980607e7 SHA-1: bf48f00b4ba1c0867b95633df48e4db10a69006a SHA-256: aabec3f1d5e92b93b41661a8c1a117eb6d35ebc0e80c3578e53e630e1a8b4ee7
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/123?utm_term=reengineering+the+corporation+pdf+download'. The document body, though heavily obfuscated, contains text related to 'reengineering the corporation pdf download', suggesting a phishing lure. The ML classifier also flagged this PDF with a high probability of being 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://cctraff.ru/123?utm_term=reengineering+the+corporation+pdf+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_5fa987028401d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479462/normal_5fad835258fbe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/29408550878.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/comcast_email_on_android_stopped_working.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/pewunegebedunifep.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/82631049923.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/baixar_foxit_editor_com_serial_portugues.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/zoxumawege.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/balovuzorejow.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/41298468341.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/aj_addon_kodi.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/toyota_camry_hybrid_2007_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/binary_code_book.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/2014_dodge_charger_sxt_awd_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/narumaxiluw.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/meeting_minutes_template_word_doc.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_off000109f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F0 5340 bytes
SHA-256: 5738bc08de054a7ffa7eb5195b2f308f0de8b6ec302bcbe84bef78f5329b6ace
font_01_sfnt_off00011c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C33 10564 bytes
SHA-256: c798f91a425063cf79d4e58f2648d780e8179affd7bef06a97593fef688df21a

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