Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdf6d2ca5b76ef6f…

MALICIOUS

PDF

98.1 KB Created: 2021-09-08 16:00:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7d342ec4e5e72f1abb40e3f4488ac383 SHA-1: b99c3cec03c6f471c0a4aa18baed1e7c0399a799 SHA-256: bdf6d2ca5b76ef6f48e243171848691a7226a68a9fc590d9059f0f4ac7b39e95
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code or redirecting users to malicious sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates the document is designed as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://iviltra.lt/images/files/libufezotuneb.pdf In PDF document text
    • http://ziconiavip.com/uploadfck/file/zamofufilurimob.pdfIn PDF document text
    • https://maintogelonline.info/contents/files/73539952524.pdfIn PDF document text
    • http://halmar.info/userfiles/file/41551849774.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/tmm10i2a11hlhj46l93ikvdg77/rekunaxa.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/37134209243.pdfIn PDF document text
    • http://babyindex.nl/images/uploads/37823419286.pdfIn PDF document text
    • http://33podarka.ru/pictures/files/milirebiluxilego.pdfIn PDF document text
    • http://enricobarraco.com/files/poxidu.pdfIn PDF document text
    • https://astefin.ro/ckfinder/userfiles/files/vakufu.pdfIn PDF document text
    • http://dailygiasi.com/uploads/userfiles/file/45486741776.pdfIn PDF document text
    • http://texinpack.com/uploadfile/file///2021090210211837.pdfIn PDF document text
    • http://idealhca.com/admin/images/file/21540725307.pdfIn PDF document text
    • http://sherwoodonionfestival.com/ckfinder/userfiles/files/pisufawitiret.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/wipilagezigeko.pdfIn PDF document text
    • http://www.aaar.cat/assets/js/ckfinder/userfiles/files/26955710226.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/juziluxukazofixi.pdfIn PDF document text
    • http://j1medical.com/uploaded/file/97141185129.pdfIn PDF document text
    • http://acril.ru/ufiles/files/40063554414.pdfIn PDF document text
    • http://learningkey.org/userfiles/mutigorasolupuwos.pdfIn PDF document text
    • http://hatdesechia.com/storage/ckfinder/files/81425061516.pdfIn PDF document text
    • http://billagelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/babusat.pdfIn PDF document text
    • http://spprp.pl/userfiles/file/38456756838.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=estudios+biblicos+para+imprimir+pdfPDF link annotation
    • 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_off000114c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C3 20460 bytes
SHA-256: c261ed4c80505e70b6eaefc9a06fb5168bb1e14ec94aac76f5a57f424e71a50e
font_01_sfnt_off00014807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14807 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001601e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1601E 10768 bytes
SHA-256: 452931e991bda619ab7d0688b10ce39efec5d873420ef9d7720eee9444a5934e

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