Malicious PDF — malware analysis report

Static analysis result for SHA-256 f58b6832e13ec7f3…

MALICIOUS

PDF

74.7 KB Created: 2021-04-03 01:50:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c273e149bb78b21aef9fde13d3e4903c SHA-1: 215a40688bc25992864ab182cba9fcb3ee01c162 SHA-256: f58b6832e13ec7f3f07294f77202a3053a76a302dbbc9669044f88f6201ea52d
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that redirects to a URL associated with job search terms, likely a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, potentially for credential harvesting or further malware delivery.

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://druttle.ru/strik?utm_term=austin+texas+cdl+jobs
    • http://gufutaca1.xyz/autodesk_virtual_agent_2017_linksjo337.pdf
    • http://repair-monokoles.ru/fukulesozasawanu5ngya.pdf
    • http://mandarins.space/memrias_pstumas_de_brs_cubas_filmedfvfk.pdf
    • https://cdn.sqhk.co/suxidixip/Kjika3X/kiditanarabunosazu.pdf
    • https://cdn.sqhk.co/tovipovo/8idhfb3/laravel_blade_format_vscode.pdf
    • http://lusoxokurutugap.22web.org/verbatim_report_adalah.pdf
    • http://tublitalia.space/26805239503urii9.pdf
    • http://ericksandoval.com/total_gym_1100_exercisesi8lik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://liwununigu.epizy.com/mopavigukenepaxabuvazok.pdf
    • http://dovijurosovixen.rf.gd/56624851480.pdf
    • https://s3.amazonaws.com/gawabog/ridgid_13_thickness_planer_parts.pdf
    • http://jopiwutipav.epizy.com/89322555086.pdf
    • https://s3.amazonaws.com/xakapudakadu/fufowazawuzeforinedekab.pdf
    • http://labomodofu.epizy.com/silaveguviv.pdf
    • https://s3.amazonaws.com/mefovu/top_10_best_navigation_apps_for_android.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_off0000e15b.bin
d8fcf0c7ee380eb23f6eea7210934b263b28453db47ada0f5ee6a2fd1fe1bb74		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE15B 5112 bytes
font_01_sfnt_off0000f2d5.bin
5546d405e703e86882e23324be0c16db7c4a627399a23d16078697a82a08350b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D5 12908 bytes

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