Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5ef8257c305290a…

MALICIOUS

PDF

82.3 KB Created: 2021-01-11 09:45:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 995f04ff02ad80890eb91edea27e39c6 SHA-1: 2d0e99c6dd4bc27fb351be11643cfff5d7a6ff04 SHA-256: e5ef8257c305290abc61e4b0546bda72caa69daa0b4b33d83f236c5325263988
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 'traffking.ru'. This indicates an attempt to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious purposes, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffking.ru/123?utm_term=fatal+frame+3+pcsx2 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4421329/normal_5fe2a92922f21.pdfIn PDF document text
    • https://site-1168348.mozfiles.com/files/1168348/88306614666.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478655/normal_5fc56722b61f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451753/normal_5fa9a4bfdcd28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495526/normal_5fb4faa300e56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383681/normal_5f8de32adb297.pdfIn PDF document text
    • https://site-1176005.mozfiles.com/files/1176005/t_mobile_phone_deals_iphone_11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403270/normal_5fe9e4e514b66.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497359/normal_5fe249d6075b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488133/normal_5ff21bbbd25df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411714/normal_5fb89abc36f49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444356/normal_5f9c685dbf14f.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/dowadotiju/rojipaleza.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/31541566813.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/my_singing_monsters_hacked_online_game.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d90f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90F 4496 bytes
SHA-256: eadc7e4d965e02cd926be16157a3de2ad64dbe5eb098a4323d997ec4dbc74a3c
font_01_sfnt_off0000e8db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DB 5480 bytes
SHA-256: 65691b4eadee7821b89bed3f7792a5dd9d722d3cd90a4ab1ec0aaca89a1a7203
font_02_sfnt_off0000fb75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB75 12188 bytes
SHA-256: 4859e9620c64b55e66a34e15259275af1036ba41c5376c82f8e930780105cdb1
font_03_sfnt_off0001251b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1251B 16132 bytes
SHA-256: 6c511cd2548aab1566dad8f54fccf2be4cd056cf5a4d5d56937977fde9165995

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