Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf039b2ea686ebd4…

MALICIOUS

PDF

79.2 KB Created: 2021-09-18 05:45:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 99fa91a73de4e27cce8d3a915e1b5a98 SHA-1: 6245cdbd3746b675e9ee17f524160b93ed09ae72 SHA-256: bf039b2ea686ebd4d62e89090be905d7f8a7870f2c0999df91aef77647b75cca
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 embedded URLs that point to disposable hosting and are structured as a link farm, indicating a phishing or malware distribution attempt. The presence of external URIs and the overall structure strongly suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://krisoc.ru/uplcv?utm_term=panda+android+market PDF link annotation
    • http://jfac.kr/ckfinder/userfiles/files/29544131212.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/85390494441.pdfIn PDF document text
    • http://przystaneknida.pl/data/aktualnosci_imgs/file/kaguvizitarebivoxepadi.pdfIn PDF document text
    • https://pfhotel.gr/ckfinder/userfiles/files/13718246918.pdfIn PDF document text
    • http://hamkr.com/userData/board/file/59025973066.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/571c4d567ddb3b04a87a16abf64bd005/nebisusoxidagut.pdfIn PDF document text
    • https://www.parquesanalbertohurtado.cl/ckfinder/userfiles/files/kusarebawavo.pdfIn PDF document text
    • https://himalmanpower.com/ckfinder/userfiles/files/55832779054.pdfIn PDF document text
    • https://playerpress.com/ckfinder/userfiles/files/bejoku.pdfIn PDF document text
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/98073095697.pdfIn PDF document text
    • https://horacebatten.com/ckfinder/userfiles/files/73265325506.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613c7bc47db6e---61232498839.pdfIn PDF document text
    • http://arkystudio.eu/userfiles/files/26114529957.pdfIn PDF document text
    • https://araprinter.com/ckfinder/userfiles/files/85340248553.pdfIn PDF document text
    • http://garmaclima.com/uploads/ckfinder/files/57025504257.pdfIn PDF document text
    • http://yibetter.com/data/files/tijexawoxiw.pdfIn PDF document text
    • http://ansonseatery.com/uploads/files/598995661.pdfIn PDF document text
    • http://instit.ac/ckfinder/userfiles/files/19600755857.pdfIn PDF document text
    • http://yeongwonenc.com/userfiles/file/33926351315.pdfIn PDF document text
    • http://tomboy2.com/images/library/File/74336226137.pdfIn PDF document text
    • https://menokatea.com/ckfinder/userfiles/files/42457510561.pdfIn PDF document text
    • http://klpa.net/userData/board/file/vegazer.pdfIn PDF document text
    • http://www.oiseaubleu-promo.fr/userfiles/file/3985654373.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_off0000d449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD449 10288 bytes
SHA-256: dd826f04a855e7e457e3f9f41ff71bf9bc83f4e2570d534e269f1bde61d004a2
font_01_sfnt_off0000eb61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10373 17092 bytes
SHA-256: cb09750a7a568a2c17d85f6cf83bc74e810a066b2da519cb3778061dd468a2dd

Open this report in the interactive analyzer, or submit your own file for analysis.