Malicious PDF — malware analysis report

Static analysis result for SHA-256 89d31575b29acc60…

MALICIOUS

PDF

68.3 KB Created: 2021-04-01 00:46:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ce536a01608069747c63dbd88fdb47f SHA-1: 717e369d601d6b7d7b2f4c2079e06cffbb8f41f7 SHA-256: 89d31575b29acc605a1aee3f84e424d5fd80eb646103f85d3552d197d78e8d7a
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a URL that mimics a search result for educational material, likely as a lure. ClamAV and an ML classifier identified this PDF as malicious, specifically flagging it as a phishing trojan. No scripts were extracted, but the presence of an external URI suggests the document is designed to redirect the user to a malicious resource.

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://ponafet.ru/award?keyword=area+of+compound+shapes+worksheet+pdf
    • http://kalidejomepajo.scienceontheweb.net/88208391208.pdf
    • http://dororuminaxa.mywebcommunity.org/in_what_order_were_the_harry_potter_books_published.pdf
    • https://cdn.sqhk.co/numokafas/QjbCsXi/best_homemade_ice_cream_recipes_cuisinart.pdf
    • http://sipataj.sportsontheweb.net/sopuxitedavaruwe.pdf
    • https://cdn-cms.f-static.net/uploads/4369917/normal_602393ee2661a.pdf
    • http://zodoworusa.22web.org/99008365201.pdf
    • https://static.s123-cdn-static.com/uploads/4527042/normal_5fdd42f4bf048.pdf
    • https://cdn.sqhk.co/nisugavu/UQCjcPz/javafx_button_rounded_corners_css.pdf
    • https://cdn.sqhk.co/xipepovivik/plhfjfB/xawoganixegew.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://70fbc5f3-53e4-4072-9ff7-a5862d19847b.filesusr.com/ugd/bb3bf9_1758662bb03f484bbc004f57cc12e05c.pdf?index=true
    • http://pudolajuji.atwebpages.com/85041456957.pdf
    • http://zelawiture.epizy.com/what_is_the_latest_software_update_for_kindle_fire.pdf
    • https://uploads.strikinglycdn.com/files/04c9d70b-0b6e-45a3-8add-2c1ceffe0ddb/xewaropine.pdf
    • https://fa886832-b9e3-4ce5-a98c-97da2614721f.filesusr.com/ugd/9f8050_0756acbb8c4f488987d5388d3c8a150d.pdf?index=true
    • http://senisiluni.rf.gd/muwomukifopotosugelobazor.pdf
    • http://kutegabirena.epizy.com/gods_of_olympus_guide_fr.pdf
    • https://uploads.strikinglycdn.com/files/7c8d54cc-23d2-45e8-af93-74647fcfece5/how_to_build_muscle_after_40_female.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_off0000ccdc.bin
4434a0e7b3df9f8257d1b2115c005ad5794e7bfc758955466312dfd327a00160
pdf-font-stream PDF embedded font (sfnt) at offset 0xCCDC 5508 bytes
font_01_sfnt_off0000df80.bin
6661ceea17d9da5bec5e534a71825646d166760f23e6501889736996ba7b6fb8
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF80 10204 bytes