Malicious PDF — malware analysis report

Static analysis result for SHA-256 6060cb75f47e0153…

MALICIOUS

PDF

69.0 KB Created: 2021-09-26 23:24:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 57f485365655ac57a6b29822c31f9d5a SHA-1: 4ede8ce7f7a4dc7c19b4369b07bef456ff2dbaba SHA-256: 6060cb75f47e01536289d48c8b65644ae5e2a83d04c877a18f2e60a0a7c62919
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, indicating a strong intent to redirect users to potentially harmful websites. The presence of embedded URLs and the nature of the heuristics suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://chcial.ru/uplcv?utm_term=lust+stories+all+episodes+watch PDF link annotation
    • http://health-bridge.in/upload/file/vukujozalolab.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/udpgqaljmdu6p10keqe6uv1uk4/gifiretojamodurananuzu.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/66251174274.pdfIn PDF document text
    • https://architektor.ru/uploads/file/nebovujusowesolimumufuxow.pdfIn PDF document text
    • http://sherwoodchambergolf.org/ckfinder/userfiles/files/sezedib.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/93000139988.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/lijikevamilalefepape.pdfIn PDF document text
    • http://4rrecycle.com/files/file/96631268814.pdfIn PDF document text
    • https://seger.cz/userfiles/file/kexidibabexuzimo.pdfIn PDF document text
    • http://teplorium.su/userfiles/file/wuditefonud.pdfIn PDF document text
    • https://datajournonepal.org/files/radutepamodisakitodekunix.pdfIn PDF document text
    • http://mcap.cz/images/uploadedimages/file/89720143733.pdfIn PDF document text
    • http://kxzyjy.com/CKEdit/upload/files/73836520471.pdfIn PDF document text
    • http://utpcomp.ru/uploads/files/22556510706.pdfIn PDF document text
    • http://poliambulatorioargentina.eu/userfiles/files/65200554345.pdfIn PDF document text
    • http://xn--80aer5aza.xn--19-kmcm3c.xn--p1ai/ckfinder/userfiles/files/fesebab.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/4i696s0ukakq1arq1d5th3mp5r/rupivixutitaxego.pdfIn PDF document text
    • https://nhomphuongnam.com/upload/files/xapubasivemunisipebulat.pdfIn PDF document text
    • https://laptoptranganh.com/data/dulieu/files/wavotasetifusapunuvibuzeg.pdfIn PDF document text
    • https://nguyenthelong.net/userfiles/files/44265249798.pdfIn PDF document text
    • http://montpellier-business-plan.fr/mbp/upload/images/images/upload/ckfinder/46843386510.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://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_off0000ac3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC3A 16556 bytes
SHA-256: 1e55eb8990a25aadc5812828e4cacba8eba02e8833f0d9e1dff01c3bb1189d28
font_01_sfnt_off0000d669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD669 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE80 10648 bytes
SHA-256: 93c8f1eee0b5d33a8d82813421566c34392afc4e2dea801f62a513b855093ee7

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