Malicious PDF — malware analysis report

Static analysis result for SHA-256 464e9b2238e8d5a1…

MALICIOUS

PDF

88.8 KB Created: 2021-01-02 13:13:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15de678e02031886583920c5b3983b77 SHA-1: 77e5e6a39bc5483ff3bc338d1777c4fcbcd2baee SHA-256: 464e9b2238e8d5a16eb4dbf2c2c884976e582b571754796149932e3e2d0eae83
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL pointing to a suspicious domain, which is likely intended to trick the user into downloading a malicious application. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the presence of the external URI is sufficient evidence for the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9884

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/aws?utm_term=apex+launcher+apk+4.+4.+1
    • https://cdn.sqhk.co/xakutofi/gxVgcij/gegesajasopojowele.pdf
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/sibegoxowew-buvepe.pdf
    • https://cdn.sqhk.co/jafetegupam/jc891gd/six_pack_beer_cooler_sleeve.pdf
    • https://cdn.sqhk.co/vuwonesi/ih7hhi8/74352217204.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5fd5ac3f-e18e-41ab-900b-e5452b36eb56/rurifem.pdf
    • https://s3.amazonaws.com/dinisemowoge/instrumen_lagu_budi_doremi_12345.pdf
    • https://s3.amazonaws.com/luxaduzimase/zuxovurelumalevexogonaxos.pdf
    • https://s3.amazonaws.com/somisilegex/soil_horizons_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/1d68897c-e504-4831-b22d-b9702f2b25f2/71514965180.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_off0000da43.bin
c26b198299991b7c8de92ca74884617681fb795fb2227e89dfaaea71e7861c1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA43 5136 bytes
font_01_sfnt_off0000ebbf.bin
41c9249e8bde39306d9a83467be6be9a4165511b44675b76db2141bcf6049eb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBF 11664 bytes
font_02_sfnt_off000111e4.bin
32bc3ea36556db64f0ce99f955d809b29f586511f36a5b63f43ab95d984c7c2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111E4 13492 bytes
font_03_sfnt_off00013c80.bin
715f14aef300c4bedc5933a746d8b92d1f4d7359f1bef1a781afce002d357bf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C80 16820 bytes

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