Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dee0a7ab257d211…

MALICIOUS

PDF

90.9 KB Created: 2021-03-31 20:50:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 057b11d9bf1fe50d81dbaf02f883eda5 SHA-1: 9fd3814aaa709dc96e94ba3b76d02420a5567aee SHA-256: 5dee0a7ab257d211325ede6765ee671db52848e24a25ee730e69ac547057b025
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 PDF contains an embedded URI pointing to 'golowaki.ru', which is likely part of a phishing or credential harvesting scheme. The document body, though heavily obfuscated, suggests a lure related to a book title, aiming to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/award?keyword=biblia+koshodou+no+jiken+techou+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426263/normal_6029f7f3f333b.pdfIn PDF document text
    • http://valuburikodajad.medianewsonline.com/58795504471.pdfIn PDF document text
    • http://jubobusuzamap.22web.org/liftmaster_8365_cost.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484399/normal_60277ac9791c8.pdfIn PDF document text
    • http://kovuzaxaf.medianewsonline.com/93812902287.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vudajerex.rf.gd/mere_christianity_ch_11.pdfIn PDF document text
    • http://vexabimumemig.atwebpages.com/bologna_mappa_turistica.pdfIn PDF document text
    • http://roxusenedo.epizy.com/gunulanalivitadisesu.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/how_to_reset_hp_p1102w_wireless_settings.pdfIn PDF document text
    • http://vumebef.epizy.com/miripij.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/gurarulakerokapixirugin.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/jizoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f1bb62d-b37c-4c41-b490-21a98879e9da/kalomodakimajasegol.pdfIn PDF document text
    • http://guxozuzemonixe.epizy.com/mudif.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/exception_handling_in_java_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd906cfe-44c9-4750-98d1-750fa8d09163/zakosevivokijokovezu.pdfIn PDF document text
    • http://dozodikud.epizy.com/rafiwutagevub.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AE 5028 bytes
SHA-256: 0d515bec9ebea7ba766ef4b47ef753deb87bae020dad368a21e86ada7709906f
font_01_sfnt_off00010234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10234 5476 bytes
SHA-256: 95f34742f886f9c4becf518d70c03a483047cb74b09310faf1733d25843d4849
font_02_sfnt_off000114d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D0 2436 bytes
SHA-256: 0a23ffd34508bbe9aa7d5153ff975556e452dbb1242daa3eecd4ba6a5325db1e
font_03_sfnt_off00011fb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB2 25872 bytes
SHA-256: 618b982102bcf2e413475c7a2469bfe82d4da01d77f0c071ff53770d267efb0d

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