Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ac699381b2b6bdb…

MALICIOUS

PDF

84.1 KB Created: 2021-02-14 03:16:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: b4c3012ecae8069bfa08a31338a9fc5a SHA-1: c3e26040f8111edd3152a605a38ffa3bbdab7c14 SHA-256: 2ac699381b2b6bdb0dca344f7a529b8f521eeae66819146a8f86da0e6636fa9a
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'leonvi.ru', which is likely used to redirect the user to a phishing site. The presence of PDF-specific heuristics further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/123?utm_term=merchant+of+venice+characters+antonio PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446942/normal_5fd17d8ac2fab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445116/normal_6002bcc2bd77c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451971/normal_600cce25c449b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483610/normal_6022cf8983605.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492901/normal_600b4c55703ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497638/normal_5ffd67c1e7f75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384652/normal_600cf4fae3d62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463006/normal_5fd1b72c297e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465930/normal_5ff33a7fe2af1.pdfIn PDF document text
    • http://c-advance.space/estructuras_de_la_mente_howard_gardnapmbr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465147/normal_60095fc53705f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tomamujuf/japan_guide_hoi4_man_the_guns.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5A 4788 bytes
SHA-256: e2e596fa0222d13da1d97eb16bd0ea10096b8804172b0f1bc92bad9405497a06
font_01_sfnt_off00010ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA1 11392 bytes
SHA-256: 7601fc719494fabf1c189f38d052742c67fe4d6ba3288981d3678dfaf90e5a13
font_02_sfnt_off0001350e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1350E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3