Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ce0ca67793d8f10…

MALICIOUS

PDF

62.0 KB Created: 2020-12-02 07:18:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 339ae24c6882cfaab302301ab107ab10 SHA-1: 88c7a3625a8135933aaa746ae84fe2a60ba0dc89 SHA-256: 4ce0ca67793d8f105845626b52e5057e9b091954dedbbb5183d675fc777a4d48
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains an embedded URL. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL, 'https://traffset.ru/strik?utm_term=north+face+mcmurdo+parka+iii+reddit', is likely used to redirect the user to a phishing site or download a secondary payload. No scripts were extracted, but the PDF structure and URL are sufficient indicators of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://traffset.ru/strik?utm_term=north+face+mcmurdo+parka+iii+reddit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383137/normal_5f90a347557ef.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/9e59b846-19b9-4944-9f30-47b6ec0f8324/pifonexopozimogozoziguw.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/46404199548.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd308239b0722912b0841/t/5fc0e70eeaf37e3b64bcfa7a/1606477583554/10x10_picture_frame_black.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0bcfb2e537a05ef083615/t/5fc3e515f81c9a2a0c19d2ea/1606673686522/womefokejamu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d96ebd14ff0dd29c6608/t/5fc1f4863485235c860cb0b5/1606546566838/98357425214.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/141a1fad-eb6a-43a7-802e-1efcac65fe51/86395877617.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dd9b8ef7301f8b108504/t/5fc3f23c08845d0924036fb2/1606677058083/fuxegigamenav.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc566d10b6b03258f537d87/t/5fc71c03c7c45a5eaf9f8947/1606884357067/gacha_life_videos_sad_love_story.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/free_template_for_release_of_information.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe26e65147b14804fc78ff/1606297319565/ellsworth_ave_school_danbury_ct.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbd5267b-97c3-4c26-ae7c-e7b56f89f0b7/acdsee_crack_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3902338-a3d8-486f-881c-dd0a12c29cec/zobafevebamemuti.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5587827a199023ad2f44a/t/5fc6c91ebfb90028be3c2367/1606863139425/tevitulirojasutag.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_off0000b6af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6AF 5216 bytes
SHA-256: 1b39a395c12f196ac11126aba9e0c7b58fdfcf0b367f2c6132e8aa21c21b35f6
font_01_sfnt_off0000c84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC84C 10160 bytes
SHA-256: 6cc3e06450dfa31e5da4d569c9778e9e15faf9ae04e600afa944170ebe831646

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