Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff9aaa2dc490e8e5…

MALICIOUS

PDF

269.5 KB Created: 2021-05-22 06:02:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5b22fbe39df854b770e7d3e70d41e63f SHA-1: 219285e86b93eca673ee757ba44f431b1ed64463 SHA-256: ff9aaa2dc490e8e579a2c5d2378f430519faecfec31d4c3e8ba51fe96fdf864a
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, vilenefex.ru, which is likely intended to host a phishing page or malware. No scripts were extracted, but the presence of an external URI and the overall detection profile suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9793

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/strik?utm_term=how+much+propranolol+for+performance+anxiety PDF link annotation
    • https://dutulizat.weebly.com/uploads/1/3/1/4/131436991/jaribuwinomat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379230/normal_60189f3f77ea0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472221/normal_5fd6f9f6dcc54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463272/normal_60494ac0d3440.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462727/normal_6015e44372f5e.pdfIn PDF document text
    • https://wajotirege.weebly.com/uploads/1/3/5/3/135306859/6860184.pdfIn PDF document text
    • https://sofowalomutupal.weebly.com/uploads/1/3/4/3/134310420/lepoju_xoregames_vamezif_visaloxu.pdfIn PDF document text
    • https://bidefajiwi.weebly.com/uploads/1/3/4/0/134096082/nuxavaxisojolaveguz.pdfIn PDF document text
    • https://funotagikaxu.weebly.com/uploads/1/3/1/8/131857914/c2610e3759a2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426677/normal_60601a9c3bd74.pdfIn PDF document text
    • https://bokoxopeke.weebly.com/uploads/1/3/4/2/134266118/nawibivitegi-bawapuvagudo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382965/normal_5fcbde960f491.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418993/normal_6041fdb26c768.pdfIn PDF document text
    • https://bunojero.weebly.com/uploads/1/3/0/8/130874162/lokowotuseken.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427519/normal_5fe00e8de6e94.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3cc8fcc-3cf2-43a7-9f63-f2fb85772d41/what_age_is_the_zone_of_proximal_development.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b8c19a5-2eb7-449b-aebe-d75e4cc6cbc5/lenovo_t430_display_drivers_for_windows_7_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/fukudafuja.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/14896038781.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/66208843313.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003ca8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3CA8E 5300 bytes
SHA-256: c5a8a3964656f27ed0622f93c19b901a811b546c56dc375519ae3fa3fd4afcc8
font_01_sfnt_off0003dc89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3DC89 16716 bytes
SHA-256: 8402832300544c48fce8114db9f0a57ae601fe0e32d744b9e57233a7a7148ef7
font_02_sfnt_off00041173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41173 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953

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