Malicious PDF — malware analysis report

Static analysis result for SHA-256 b656f7dc17f986f1…

MALICIOUS

PDF

70.6 KB Created: 2020-12-29 23:48:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: decc3635d766147d8119b785d24e7bdc SHA-1: 2a185d029c6561db676651a8a14c8f0f13f2c6bc SHA-256: b656f7dc17f986f197dc9fa3ef82cea225a4bdcf2c46450a5fc4528676ed8e74
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://ggtraff.ru/strik?utm_term=snes+classic+refurbished+nintendo'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. 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://ggtraff.ru/strik?utm_term=snes+classic+refurbished+nintendo In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383804/normal_5fdba13a8680b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451352/normal_5fb642f810c11.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/jifesu/ariston_velis_50_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/reliance_capital_ltd_annual_report_2016-_17.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/felotinadogemanomagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f9ea7bb-e233-4935-b903-b781a3b7de40/pexeku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ed2a0ce-0d86-4c57-abff-5c0408131dee/cameron_surgery_textbook_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7250cc66-7dd5-4ef0-ae11-e5f9dbc5bb8d/24963135624.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/17395922318.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/bmi_chart_in_kg_and_feet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/563dd482-ebdc-47a5-8abd-e15f1f3b3e0f/tixusuzaxelo.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/catcher_in_the_rye_anticipation_guide_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1194b43f-f7ca-4d1d-8579-a3efb21e43b6/skins_for_minecraft_pe_apk_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd24bc33-c907-44d2-9a03-080cc18f2b6b/89340386476.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/98457390722.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b62db289-4b9a-4ba4-bfe2-84b4bac6aa75/degatarosekuxarilibomexud.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/may_calendar_2018_printable.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_off0000c84b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC84B 5236 bytes
SHA-256: 08d717c44c647d2c94c880e7b64c67ec481dc5940bac3dcbb48277f23a3ea893
font_01_sfnt_off0000d9fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FA 10936 bytes
SHA-256: 64ea415b8b1ed7f7d323662baa828ff20cfcbf55647c609a9790f621eb36d441
font_02_sfnt_off0000ff70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF70 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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