Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3606fe675175fb1…

MALICIOUS

PDF

76.1 KB Created: 2020-12-22 17:42:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b22d5a8410ec4e24711055b46eb6c2a SHA-1: 1d7a8e2648da73e002028b4a3ef5ed4b8675a0b0 SHA-256: c3606fe675175fb1d389721851d4ba83fbc439c6a8e214ee422f7907631cdb0d
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'trafftec.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to 'The light between oceans summary ending', possibly to trick users into clicking the malicious link.

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
  • 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://trafftec.ru/strik?utm_term=the+light+between+oceans+summary+ending
    • https://cdn-cms.f-static.net/uploads/4481539/normal_5fa777b702f10.pdf
    • https://cdn-cms.f-static.net/uploads/4421341/normal_5f98edc07911f.pdf
    • https://cdn-cms.f-static.net/uploads/4373259/normal_5fba47700133b.pdf
    • https://cdn-cms.f-static.net/uploads/4472213/normal_5fb8fad86ca96.pdf
    • https://cdn-cms.f-static.net/uploads/4380213/normal_5fa377c15cdc7.pdf
    • https://cdn-cms.f-static.net/uploads/4455657/normal_5fb9bf223fe44.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zuxadol/83097053323.pdf
    • https://s3.amazonaws.com/sugaguxagu/vamajokugupenad.pdf
    • https://static1.squarespace.com/static/5fc0ec6c8787e879896c16ae/t/5fc25759e6d49a06bbdec314/1606571867070/11083884446.pdf
    • https://uploads.strikinglycdn.com/files/661207b2-290d-4855-9db4-94b2e94cd5e7/13252977255.pdf
    • https://uploads.strikinglycdn.com/files/92521687-995a-4cf4-b195-63193e9e0350/slender_man_free_download.pdf
    • https://s3.amazonaws.com/vikukinumet/assassin_s_creed_identity_free_rexdl.pdf
    • https://uploads.strikinglycdn.com/files/058e7e2c-cd91-4a9b-9322-b8c13fa11095/christian_schools_near_mechanicsburg_pa.pdf
    • https://s3.amazonaws.com/nowokil/twinkle_twinkle_little_star_guitar.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea0c.bin
dff43eda899980f6c9c47dec616c0f41d2137b030bd20090ec1e62cded1662dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0C 5636 bytes
font_01_sfnt_off0000fd25.bin
3e142ce0dd43ba82ac45e3a6d33da814ccfa4330fe97626a958a5ee1fc03ef1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD25 11132 bytes

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