Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3efc42c9ec4472e…

MALICIOUS

PDF

63.7 KB Created: 2020-12-15 21:56:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6382c1b0de0e183df6bdbcabf5eda80c SHA-1: 4e0be3d576673b1cbe77b3f81e0d9752d6017adf SHA-256: c3efc42c9ec4472e99dd33c44afcd31dbab0c9fba2709d0f85534a87bc59ca84
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/123?utm_term=ghost+vapor+flashlight'. Additionally, ClamAV and an ML classifier flagged this PDF as malicious. The document body is heavily obfuscated and unreadable, but the presence of a malicious redirector strongly suggests a phishing or malware delivery attempt.

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=ghost+vapor+flashlight In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420238/normal_5fa8439cf1732.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407789/normal_5fbf3b5483073.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/kaxukok/as_400_software.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/tx_5.0_rc_treadmill_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/87035402309.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0d35098-1e58-4039-9254-4105a621ebac/genero_dramatico_elementos_y_caracte.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/merge_dragons_quest_stars_1527.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/61101828101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/198a4acc-9e60-4798-ae20-ab817294902e/pimidezidimom.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/74755982762.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/corsair_cove_osrs_money_making.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/586888cb-0a86-48ad-8306-9c2cfb088d15/cummins_isx_service_manual_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b546304-2373-4cee-8584-39c39e1ee2ce/a_volcano_in_my_tummy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04c94083-8c63-4235-b9d6-2c60d13c6510/mowutaxegulezukipu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e5c26a8-84ce-43b2-b2bf-3280091aab85/little_caesars_essex_vt.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_off0000bd5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD5B 5252 bytes
SHA-256: da6a91653ab10b9d63c6cb828b118495fdd75fb0f8070ac8eb6e5b4079823676
font_01_sfnt_off0000cf42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF42 10196 bytes
SHA-256: f601ddd895bd47b41dc3986dd9e99297c9a090cb2a03113ddccfcca43ede40f2

Open this report in the interactive analyzer, or submit your own file for analysis.