Malicious PDF — malware analysis report

Static analysis result for SHA-256 935c36a16c7d7f96…

MALICIOUS

PDF

101.1 KB Created: 2021-03-31 10:26:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f93ab5487d02f39ad9e098f9fc3b58f5 SHA-1: 52496accffc2d3ac5c3569e9e4c01e609244a005 SHA-256: 935c36a16c7d7f96d85878605b81d94b17e063078e1500ffb807e91a9c3b0476
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that points to a domain commonly associated with malicious activity. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though heavily obfuscated, suggests a lure related to a game, which is a common tactic to entice users to click on malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://kuzutuzo.ru/wix?keyword=rainbow+brick+breaker+unblocked
    • http://bexodasavuf.22web.org/wupugexopixaxizileser.pdf
    • https://cdn.sqhk.co/kefexunas/5sgcphi/o_baby_kannada_video_song.pdf
    • https://cdn.sqhk.co/fudimesa/6nWja5R/41718897807.pdf
    • https://cdn.sqhk.co/biwizalibe/hLG0Hgd/lesasifefeke.pdf
    • http://jomotew.iblogger.org/soul_ties_book.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vunojagona.rf.gd/alagappan_general_medicine.pdf
    • https://uploads.strikinglycdn.com/files/edc17e41-c6c2-462d-8450-2f7d821aba99/simizutukenenefiwu.pdf
    • http://wekumut.epizy.com/united_health_care_prior_authorization_medication_form.pdf
    • https://uploads.strikinglycdn.com/files/65336701-2cf0-463b-8fe0-afc1daf12910/44097278949.pdf
    • https://uploads.strikinglycdn.com/files/e7179dc9-8f5c-4c34-b165-ab1a8a5c9032/zarefazijomurexuket.pdf
    • https://s3.amazonaws.com/dazinibonofobi/business_information_systems_degree_reviews.pdf
    • https://uploads.strikinglycdn.com/files/d169860f-d1e7-4065-adaf-1772e654440c/fetadesal.pdf
    • https://uploads.strikinglycdn.com/files/85c51040-1680-4523-81f4-75405a615640/xukazikufak.pdf
    • https://uploads.strikinglycdn.com/files/3d789f5e-8cbe-4000-af5f-69b525259165/fapobeteziponujuz.pdf
    • https://s3.amazonaws.com/piwanisaj/5088720922.pdf
    • http://boxawigituwa.rf.gd/90560243461.pdf
    • https://uploads.strikinglycdn.com/files/f27a7b5d-6b94-482d-889d-d929b3d4fa56/47287795431.pdf
    • https://uploads.strikinglycdn.com/files/e5c5c75c-8d3e-4ac3-ade8-d3565db68b81/66016858292.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e008.bin
65b8518c2e12973d81b646c56ca276cf4629b0a844108bcc05d92a56fe2180f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE008 28616 bytes
font_01_sfnt_off000139ac.bin
f3a8aa7fe5455a584b33765d9b13a52efda9b6d99efd9d4e62aa084b10f68d32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x139AC 5060 bytes
font_02_sfnt_off00014b06.bin
eea9bc2a350f3dcb1a8c9bd66cb844e7f5e4e662b360e9a61b1a35bd8cacb144		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14B06 10708 bytes
font_03_sfnt_off00016faf.bin
c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16FAF 16204 bytes

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