Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f03a93a3eb176b8…

MALICIOUS

PDF

253.0 KB Created: 2021-02-12 06:29:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 689a2d56a3419dd44f9dc5601f42887f SHA-1: 44056ec0ff9657b8de8830a51ae0f2a075457a54 SHA-256: 8f03a93a3eb176b8ede8adf0e42794adeb550c309453a3ae85e2d8f854dd3705
104 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, contains keywords related to 'Entergy smart meter complaints' and 'account will be terminated', suggesting a phishing lure. The presence of an external URI pointing to 'seumenha.ru' further supports this, likely leading to a credential harvesting page or a further stage of infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/wix?keyword=entergy+smart+meter+complaints
    • http://microbestdigitalmeter.xyz/pimopizuvurijerifazaxq2xf1.pdf
    • http://xemopubuga.iblogger.org/sowopono.pdf
    • http://djami.ru/como_transformar_de_centigrados_a_kelvin847b7.pdf
    • https://dilisuri.weebly.com/uploads/1/3/5/3/135326113/labesotupuzet.pdf
    • http://podarokinsta24.online/14253840035vjdjl.pdf
    • https://xiwabedosebu.weebly.com/uploads/1/3/1/3/131398066/wulafefiruparos.pdf
    • http://gtmedis.com/beaches_in_india_beaches_in_indiapbl78.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://roxifopovarag.rf.gd/xemipejesodajezujogab.pdf
    • http://jalafud.epizy.com/tizulu.pdf
    • http://zorijofoxafa.epizy.com/90268051703.pdf
    • http://kejefutipetube.epizy.com/malcolm_baldrige_framework_for_performance_excellence.pdf
    • http://lizedugenok.epizy.com/80492995298.pdf
    • http://mebexadesojixip.rf.gd/avantree_long_range_bluetooth_transmitter_manual.pdf
    • http://zekubegem.epizy.com/pagenogosulawabuzetur.pdf
    • http://nuxidowu.epizy.com/sikes.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_off0003a778.bin
6cf522459536d58e7f0c84d3144a95432f9464b38460e54c4a964a33cb18d0ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3A778 5312 bytes
font_01_sfnt_off0003b97f.bin
4bcc9aa75b356e37d21557513268d2102daae3262ad6d95d070c8d878a410c0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3B97F 14096 bytes

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