Malicious PDF — malware analysis report

Static analysis result for SHA-256 c953b353f65326ed…

MALICIOUS

PDF

69.0 KB Created: 2021-06-01 08:22:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38810068422fca62639a895bf9296d76 SHA-1: 2a2023fa63469e35302ea54ddf4459f66863f4cf SHA-256: c953b353f65326eddff14bdb6b6d7a168dd6fad958963dbe8c781b7850070bf1
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URL that appears to be part of a phishing lure, disguised as a calibration document. The PDF structure and embedded content suggest an attempt to exploit users through social engineering to visit a malicious site.

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://oniceh.ru/uplcv?utm_term=red+brick+esc+calibration
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b331551648---16532631994.pdf
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/53a7594bc89bfabdb556157caa20e64c/wokekuloderi.pdf
    • https://commonwealthsportsawards.com/userfiles/file/76628551495.pdf
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/77710417b87e386b05337cb61f4237c4/jusitakamupavi.pdf
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff06ecd8d5---benebikilar.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/8abc4ee6edb41db7f0989f4a5a0a74dc/90228299982.pdf
    • http://amexeuro.com/an3_Uploads/file/17191047370.pdf
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/en122qcft58a72c1f9r6s8op80/sokitidapole.pdf
    • http://alexhofford.com/temp/files/file/mepokafivobaxivaxubuv.pdf
    • http://kartywspomnien.pl/uploads/assets/file/99972547562.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/r9690uij3t7tmnvhsie58q9qf3/kaduw.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d41830cc9---97614062236.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088fabaf2466---39630892293.pdf
    • http://dermaktif.com/imgup/file/18268920708.pdf
    • http://aceonlinementors.com/userfiles/file/lizazaxoju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000ceb1.bin
4824eb32dbc2b30b587ba6574cf44eb21be01e7345244a31765e685d33311e7d
pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB1 5144 bytes
font_01_sfnt_off0000e042.bin
9c51832e5e3a3d1c17fcafee32714553020f52b40e8b7e7eb1f715092996b4f4
pdf-font-stream PDF embedded font (sfnt) at offset 0xE042 11508 bytes