Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3f00568d4b4de0a…

MALICIOUS

PDF

74.5 KB Created: 2021-03-01 07:45:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5f711b95a26fb1df5fbf0e7fdf2ae558 SHA-1: a9e09603470fcd0990d696adb4fd531225ec490a SHA-256: e3f00568d4b4de0a3b191c4cda4c6bae1f532b72404eef9583f2962993266a80
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'vilenefex.ru', which is likely used to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to a 'diet breakfast', a common tactic for phishing scams.

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://vilenefex.ru/aws?utm_term=adrenal+reset+diet+breakfast PDF link annotation
    • https://cdn.sqhk.co/nilesatu/SgdmoDh/real_drift_racing_switch_nsp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366308/normal_5fcc59f88e0a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420238/normal_5fdef297ae2f1.pdfIn PDF document text
    • https://cdn.sqhk.co/savunowudob/j0gjaHo/among_us_wallpaper_aesthetic_pink.pdfIn PDF document text
    • https://cdn.sqhk.co/nujoxodove/fihjcOS/umc_pay_period.pdfIn PDF document text
    • https://cdn.sqhk.co/jojojidatun/hjNpibN/jarefizerizubanixizafas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384307/normal_6015d338431ad.pdfIn PDF document text
    • http://xanimupa.22web.org/flight_simulator_2018_free_full_version.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tosememab.rf.gd/93632816070.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/ssrs_report_builder_iif_null.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/29817081727.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/pcb_layout_design_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/aadhar_card_online_form_kaise_bhare.pdfIn PDF document text
    • http://dowijasimenazo.epizy.com/33447487710.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/genie_blue_max_3900.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE736 5096 bytes
SHA-256: 79cd2b36265f0b5527ab5097bfa083b1bdb3434100d106eb8e4205a844c1bc0c
font_01_sfnt_off0000f896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF896 10796 bytes
SHA-256: fab27ec0effa33155624638ec63e37372057d7d72bb71dece457c73fc372f2c0

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