Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3a507ec7834cdfc…

MALICIOUS

PDF

67.8 KB Created: 2020-12-29 15:10:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: cb4bc946204ff4ffb0d6e0d9cc0fce81 SHA-1: 93bff0099474bf4a85abec8c0551e4bc89e03191 SHA-256: f3a507ec7834cdfcb9cbbdf91c2830189ee92a2e2d04836420872e7ceda7877c
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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 'cctraff.ru'. The document body, though heavily obfuscated, contains text related to 'Catfish near me dallas', suggesting a phishing lure. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=catfish+near+me+dallas In PDF document text
    • https://cdn.sqhk.co/sozaxejiv/Ghhjgif/arma_tactics_demo_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/lotazoza/Loiaha2/8004076203.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e874aa92-4d8c-4977-bdea-da3d12b5cf34/how_to_cook_turkey_bacon_wrapped_asparagus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8635210d-be8d-41ee-83c2-0f828b2fd3d4/fruit_cut_slice_game_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/athenian_democracy_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e447a88-0170-43fa-ac4b-11cc69649bda/1147030792.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3250d12d-6c0c-4d97-a018-b6e2cca60d45/95554920680.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10b51305-55c1-4561-8a9a-a83700a53a4c/66240063174.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a98def7-4e4d-4df3-be83-8e9df1769ff4/sesowowaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01eeeadd-328d-4172-a3d1-5be4f1a0032b/sift_heads_world_act_2_cheats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ce0db6a-d76b-4656-8773-ccdfae93c657/32808224788.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bec55538-e0bc-46c6-968b-a6c6e08c6c16/49848075644.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_off0000ced1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED1 5052 bytes
SHA-256: d7fcfb1dff5008f6e71007084a21d8c1fdfaa793cabccbb7a7eba877a87557c2
font_01_sfnt_off0000dfd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD2 10268 bytes
SHA-256: f203db701727abf016d5555c13a1235a032524fa2474c01a14d2625732f30248

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