Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2d41126d53b7020…

MALICIOUS

PDF

83.0 KB Created: 2021-03-19 06:54:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e7a71f39c9637b2a1e954976c43cc69 SHA-1: d2741b6f0c2c36a5d08cf7ac3fa2c6c2ca630d28 SHA-256: a2d41126d53b7020b86e7387236a06349d39eed0529990641adcba3fa46fa345
96 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with the primary one being 'https://leonvi.ru/wix?keyword=visible+ops+handbook+pdf'. Heuristics indicate this is a malicious PDF, and ClamAV detection confirms it as a phishing trojan. The ML classifier also flagged it with high confidence. The presence of embedded URLs suggests an attempt to redirect the user to malicious content, likely for downloading further payloads.

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://leonvi.ru/wix?keyword=visible+ops+handbook+pdf
    • http://godotobekof.scienceontheweb.net/vosupaxikatujotole.pdf
    • http://kolekewoni.mywebcommunity.org/titus_andronicus_the_monitor_2010.pdf
    • https://cdn.sqhk.co/gokovolasula/gjcheUs/gefinadupeloji.pdf
    • https://cdn.sqhk.co/lukejisuvawe/igshg5x/fatisemomavezovivuvex.pdf
    • https://cdn-cms.f-static.net/uploads/4425917/normal_601a9d896e584.pdf
    • https://cdn-cms.f-static.net/uploads/4370542/normal_603ea4583df79.pdf
    • http://sikakapu.medianewsonline.com/jose_maria_arguedas_agua.pdf
    • https://static.s123-cdn-static.com/uploads/4452161/normal_6005736e229e1.pdf
    • http://zimezobot.getenjoyment.net/tifewa.pdf
    • http://raponikidosal.getenjoyment.net/access_control_system_design.pdf
    • https://cdn.sqhk.co/visevunu/ji2gdJZ/85915590953.pdf
    • https://cdn.sqhk.co/pinebiven/cemIgc7/sap_ecc_on_hana_installation_guide.pdf
    • http://lotobajigufar.mywebcommunity.org/62338168531.pdf
    • https://static.s123-cdn-static.com/uploads/4457847/normal_5fce34c4c877b.pdf
    • http://fekosuse.getenjoyment.net/forklift_training_requirements_alberta.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nowokil/21010884019.pdf
    • http://ginowane.onlinewebshop.net/wild_game_trail_camera_reader.pdf
    • https://uploads.strikinglycdn.com/files/bd3d53a3-33e1-48cf-9376-c70f92f0e189/xitudilu.pdf
    • https://uploads.strikinglycdn.com/files/b8fb4455-5d92-48f2-b6d3-4f5671a6277a/21159423350.pdf
    • https://s3.amazonaws.com/setikizo/54590268316.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_off00010833.bin
9a5d5d37a528bdb537df580766fa3c67ec2810a27dbbea592d30fc5cee044eec
pdf-font-stream PDF embedded font (sfnt) at offset 0x10833 5200 bytes
font_01_sfnt_off000119e1.bin
86501e44b01240d5dc790d96ecd205e2b320ca73b1630ace756c39dc9f80c685
pdf-font-stream PDF embedded font (sfnt) at offset 0x119E1 10892 bytes