Malicious PDF — malware analysis report

Static analysis result for SHA-256 f94ab4af8f0182f5…

MALICIOUS

PDF

119.4 KB Created: 2021-03-22 19:04:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46e666a55335885453a8e38a100f9325 SHA-1: b0cbd8a2455edb7b6a74bbdf0088998b64746a4e SHA-256: f94ab4af8f0182f5bb33d25f8fc324c246da2daf70eeaf5856aaeb10aeb78b5a
104 Risk Score

Malware Insights

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

The PDF contains an external URI pointing to a suspicious domain, and ClamAV detection confirms it as a phishing trojan. The ML classifier also flagged it with high confidence. The presence of an external URI suggests an attempt to download a secondary payload, likely for phishing purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://lozipotod.ru/123?utm_term=balance+of+payment+deficit+pdf
    • http://safijejog.mygamesonline.org/todujukaworaxoxanemukowum.pdf
    • http://mitutepoka.medianewsonline.com/70631188984.pdf
    • http://kazexezawulozij.mypressonline.com/third_law_of_thermodynamics_chemistry.pdf
    • http://dhl-order.info/vermont_national_and_state_parks_near_me97w4a.pdf
    • http://kajuzumanaz.sportsontheweb.net/28358008752.pdf
    • http://lozipazom.sportsontheweb.net/79795343436.pdf
    • http://pozijuza.scienceontheweb.net/funcion_de_hormonas_del_sistema_endocrino.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6c473ef0-402e-45f0-9f95-6bc7e89a6a1a.filesusr.com/ugd/5518c3_6306a6961a394ff09cb9d2a2cd16ca36.pdf?index=true
    • http://livirava.atwebpages.com/73246827835.pdf
    • http://zetafis.rf.gd/assinatura_invalida_certificado_digital.pdf
    • http://gaxilitexu.onlinewebshop.net/etiology_of_diabetes_mellitus_type_2.pdf
    • http://matowozor.epizy.com/carpet_cleaning_machine_repairs_melbourne.pdf
    • http://bolirazebaf.myartsonline.com/70965531349.pdf
    • http://wuwedilejom.myartsonline.com/angular_flex_layout_tutorial.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_off000194f4.bin
11eee9edd9d45a360abe80452999f2596a1a08f30c28ee29a8567e94850e250d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x194F4 5180 bytes
font_01_sfnt_off0001a697.bin
24de6cd3180e89f09188a7139d9cfad93199261cdf3ed4db42f4138f4a0a45a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A697 12860 bytes

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