Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bd10b0f8f4d312a…

MALICIOUS

PDF

72.1 KB Created: 2021-01-18 23:05:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8f70daf0547468903b50399b63d8583 SHA-1: 72a359ea6d9d689eb75b8a914dbf6b0dd66f231a SHA-256: 2bd10b0f8f4d312a2afc2f7142d28ee8eefd1105536100b61ba6ba898584e6e6
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of external URIs and embedded URLs suggests the document is part of a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF format can embed JavaScript for malicious actions, and the numerous external URLs point to a potential download or redirection mechanism.

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://bologen.ru/123?utm_term=manual+de+instrucciones+en+espa%25C3%25B1ol+baofeng+gt3+mark+ii
    • https://static.s123-cdn-static.com/uploads/4455399/normal_5fc9a965a85e7.pdf
    • https://cdn.sqhk.co/zoxogatuv/1hin8hi/kasizutixe.pdf
    • https://cdn.sqhk.co/lenufetimop/ighgeB1/93365582865.pdf
    • https://cdn.sqhk.co/tumupowe/ihc5HSE/mebusibuvalavutapisapol.pdf
    • https://cdn-cms.f-static.net/uploads/4425760/normal_5fb27bd2d3bd8.pdf
    • https://cdn.sqhk.co/vazodowadu/fifYVjf/furuzorilonubixul.pdf
    • https://cdn.sqhk.co/tixelila/jd3YMq2/zombie_blaster_firework.pdf
    • https://site-1178226.mozfiles.com/files/1178226/guided_anti_ship_missile.pdf
    • https://cdn.sqhk.co/vovoritufi/uhiUPij/natigijoledosabaledon.pdf
    • https://cdn-cms.f-static.net/uploads/4476578/normal_5fe96262cbf94.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/dutimajizowa/37837472549.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc08.bin
98d308d72725115faa26eb1b6340a62a561ffa8bb874f48de1a6a3e3deca8c0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC08 5940 bytes
font_01_sfnt_off0000dfe0.bin
3c3fb20455938d7f0df22438a3a8743ed49df435024be2172ef2714a7a4de035		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE0 10184 bytes
font_02_sfnt_off000102bc.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102BC 4324 bytes

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