Malicious PDF — malware analysis report

Static analysis result for SHA-256 df54195d44e56e07…

MALICIOUS

PDF

63.1 KB Created: 2020-12-22 22:12:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e13daccbf78379798144b0ae4b45c476 SHA-1: 6bfe5f05c33020dc1f913d070c2ababd4cf51a8d SHA-256: df54195d44e56e073487346c19ef06be9d0e2410353c5b8c9d4dc99c1fd9588a
162 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 'https://cctraff.ru/aws?utm_term=catchers+hile+apk+android+oyun+club'. This, combined with a high ML classifier score and ClamAV detection, strongly indicates a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains strings that may relate to the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?utm_term=catchers+hile+apk+android+oyun+club
    • https://cdn-cms.f-static.net/uploads/4471992/normal_5fa7629429e06.pdf
    • https://static.s123-cdn-static.com/uploads/4446931/normal_5fc4f732336a6.pdf
    • https://cdn-cms.f-static.net/uploads/4453730/normal_5fb2cd0228687.pdf
    • https://static.s123-cdn-static.com/uploads/4470543/normal_5fcc8b791f83a.pdf
    • https://static.s123-cdn-static.com/uploads/4402711/normal_5fd066a8a4785.pdf
    • https://cdn-cms.f-static.net/uploads/4382405/normal_5f92b64d9e834.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc7acbda4492a057e24fc6f/t/5fcb07aa21c0486e918d9c6c/1607141293510/golden_shoe_2020_race.pdf
    • https://s3.amazonaws.com/fuwuzerijofa/hooke_s_law_simulation_lab_answers.pdf
    • https://uploads.strikinglycdn.com/files/1712f74c-2ce1-4af5-a643-b514a85ca69b/28213937956.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4bd6cb3e0f577145c3ef/1606372310880/candles_in_the_rain.pdf
    • https://uploads.strikinglycdn.com/files/a963a9aa-8343-4c91-a255-f85c7681124a/bujixisefidasubovidiguxez.pdf
    • https://uploads.strikinglycdn.com/files/76ab9ba6-6e7b-46cd-86b8-3003e65f9475/pimutumajudegepomugof.pdf
    • https://uploads.strikinglycdn.com/files/f16fd2bc-2769-407d-96a2-877823f55589/dads_swim_club_coaches.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_off0000bb1f.bin
87eed739230c86d909aa0888a8a15415705c0f0b5d1504fe8abf5a89511119ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB1F 5372 bytes
font_01_sfnt_off0000cd56.bin
906fc7f5466550e80acbf5426cbd2375baf9179718685d986b3dc16181eedaed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD56 10208 bytes

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