Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d1e9fb1e13aded8…

MALICIOUS

PDF

75.1 KB Created: 2021-04-08 01:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 3578ddd784cf4f3756b877eb8b1bd221 SHA-1: 52f2d27354176db4263052f9f315132d61dfcc08 SHA-256: 9d1e9fb1e13aded82e8d223dc7175fd7d43baa9eb8864dead32e2da88039ed73
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to 'leonvi.ru' and disguised as a movie trailer. This suggests a phishing or malware distribution attempt, likely using the document as a lure. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/wix?keyword=my+friend+pedro+trailer PDF link annotation
    • https://cdn.sqhk.co/kutajanode/CMijhj9/real_football_2012_games_for_android.pdfIn PDF document text
    • https://rixogeki.weebly.com/uploads/1/3/4/6/134693266/fofer.pdfIn PDF document text
    • https://woremudof.weebly.com/uploads/1/3/4/7/134701645/da3b049568.pdfIn PDF document text
    • https://cdn.sqhk.co/fodexuxefeba/4giOajh/wild_west_escape_room_cheats.pdfIn PDF document text
    • http://voirly.xyz/55247750257frgde.pdfIn PDF document text
    • https://kujufilobi.weebly.com/uploads/1/3/1/4/131482850/7518525.pdfIn PDF document text
    • http://thailandlove.site/povanesasubazakarcbx5o.pdfIn PDF document text
    • https://limemival.weebly.com/uploads/1/3/4/6/134610694/wovamolere.pdfIn PDF document text
    • https://muduvikude.weebly.com/uploads/1/3/4/4/134483108/sepubawozenefudoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/biographies_for_3rd_graders.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/alpinestars_leather_jacket_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/fukushima_news_report.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/zogexulogez.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/about_me_template_for_work.pdfIn PDF document text
    • https://da5bec28-7969-4117-8ffb-5069fce5e80c.filesusr.com/ugd/31593d_93232932fbeb4faea7c1e04a86c524af.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/loxuwo.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/borax_bead_test.pdfIn PDF document text
    • https://3778afa4-e5d9-4bb6-be54-d343c89b577b.filesusr.com/ugd/11c894_eca6c1c1d75a41b690b8a1aa8946be29.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bezutu/pofisem.pdfIn PDF document text
    • https://3ff4c494-4984-418a-b709-7a5c611cca0a.filesusr.com/ugd/adbee0_ee11df2d781a4077a33db52eb0a83f5f.pdf?index=trueIn 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_off0000e7c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C4 4964 bytes
SHA-256: 97c0c4386d47b320373379c47ffa0a64393c72519bfbc873d7f191f862f46141
font_01_sfnt_off0000f8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CF 11168 bytes
SHA-256: 51cae1b4652d36464f7f0e6ac8d4a10c5aa8651c8d1bc22ebdca6a273b322bbf

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