Malicious PDF — malware analysis report

Static analysis result for SHA-256 23460390557f510f…

MALICIOUS

PDF

69.7 KB Created: 2021-03-19 13:52:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c747e7a577794b47febfa20c341ac27 SHA-1: 65ac43290aea7b2c324a71980c81b0474fca33f5 SHA-256: 23460390557f510f1437b23bcd179a71fd4057a0aa366798d44adff7ee4fb0ec
96 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site disguised as a vocabulary test. The PDF structure and embedded URLs suggest an attempt to trick the user into downloading further malicious content or visiting a malicious site, aligning with spearphishing tactics.

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://vilenefex.ru/award?keyword=vocabulary+test+template+pdf
    • http://stepka2016.xyz/tidijitufomisamuzuparubl84n7.pdf
    • https://parafobosa.weebly.com/uploads/1/3/1/8/131857791/kaxogakijigovo.pdf
    • http://rasezatoxefu.mygamesonline.org/gowoperatapegizizafijed.pdf
    • http://kvyovk.xyz/kefesonevortoi72.pdf
    • https://cdn-cms.f-static.net/uploads/4421473/normal_6050a7cbb3c92.pdf
    • http://kogutojoveso.mywebcommunity.org/33952658453.pdf
    • https://cdn-cms.f-static.net/uploads/4501645/normal_602a12e375576.pdf
    • http://energytik.net/872998441814d6fm.pdf
    • http://lipexifinidoda.scienceontheweb.net/96548076663.pdf
    • http://mazafaka69pussy.online/89870349730e86q7.pdf
    • http://lunatan.medianewsonline.com/65998730166.pdf
    • https://xoverepidagagit.weebly.com/uploads/1/3/4/4/134469055/javofapadufofol.pdf
    • http://teasmall.space/los_juegos_del_hambre_parte_1_repartob5pvs.pdf
    • https://pufinixebajev.weebly.com/uploads/1/3/0/8/130873949/6872fd05ed3d9e.pdf
    • https://fosevikotik.weebly.com/uploads/1/3/1/6/131637163/xezebuladareri_pisiwuka.pdf
    • https://cdn-cms.f-static.net/uploads/4465403/normal_6052cc5f21737.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/589437e0-e51a-4e2d-99f4-58f93fcc5c8e/how_to_tie_loop_knot_fly_fishing.pdf
    • https://uploads.strikinglycdn.com/files/98dd5a38-0c24-44b0-91b9-ceabdd393a6a/61623625943.pdf
    • https://uploads.strikinglycdn.com/files/e7d14c5a-7cd8-450c-a5d6-28894aca68cd/larimonimefoxagugivuvudi.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_off0000d33d.bin
266c35e9b963bca26d4e4e095a92a0d988791743a3011f33d6c5f4a966012b5d
pdf-font-stream PDF embedded font (sfnt) at offset 0xD33D 5508 bytes
font_01_sfnt_off0000e5ec.bin
0f0007004879f968f27da18d615197a046aa4718a7c77fe9c71d4e9e7cdbef4c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EC 10444 bytes