Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab43bd94a3a29a67…

MALICIOUS

PDF

82.7 KB Created: 2021-10-07 17:29:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f15a4b8fdeabf38b5a9a95f300101f0a SHA-1: 59af03071e0cee4d73670b35914def0c05b76013 SHA-256: ab43bd94a3a29a671c5fe10e97751c6cea03108b6132ec02a447e83169baddd5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as a link farm, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://vanrun-it.nl/userfiles/files/xerevixepo.pdf In PDF document text
    • http://gemcom.org/userfiles/file/18242940210.pdfIn PDF document text
    • https://scalping.ir/data/files/file/fovamiropasenasizuf.pdfIn PDF document text
    • http://lamorenj.com/userfiles/files/pudibonoponutiniwitino.pdfIn PDF document text
    • https://cristalparkhotel.com.ve/ckfinder/userfiles/files/4480955692.pdfIn PDF document text
    • https://hoangvan.vn/wp-content/uploads/files/51950952560.pdfIn PDF document text
    • https://exam12.menapoint.com/app/webroot/upload/files/71946176033.pdfIn PDF document text
    • https://inprovitecuador.com/ckfinder/userfiles/files/nuzabobek.pdfIn PDF document text
    • http://bestbelly.org/content/files/files/binujevobusolekanutu.pdfIn PDF document text
    • https://www.larche-de-jules.fr/ckfinder/userfiles/files/wejokoledotamod.pdfIn PDF document text
    • https://korankertas.com/contents/files/rapemikokopabibez.pdfIn PDF document text
    • https://pyccenter.com/images/Upload/file/97790826409.pdfIn PDF document text
    • http://thekreativecompany.com/uploaded_files/userfiles/files/zeduzat.pdfIn PDF document text
    • http://noithatphathuy.com/Images_upload/files/14440251113.pdfIn PDF document text
    • http://medi-sen.com/files/files/poniwuxodabu.pdfIn PDF document text
    • http://gerocuki.hu/user/file/vegifaji.pdfIn PDF document text
    • http://lpc2529.com/piceditor/file/68365838994.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/ec4ba34a4005b49bbff56d2e6a06117e/52075813161.pdfIn PDF document text
    • https://kulittelor.com/contents/files/molikadi.pdfIn PDF document text
    • http://showpalmedical.com/userfiles/xofixam.pdfIn PDF document text
    • http://mazraeir.com/images/upload/files/salupaxajijama.pdfIn PDF document text
    • https://brs.jo/userfiles/files/xevibekunuk.pdfIn PDF document text
    • http://dierenwinkelindex.nl/images/uploads/65903305430.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=bdo+maple+timber+locationPDF 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_off0000d980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD980 20112 bytes
SHA-256: 7db9cfdefbdea9b6521249dea01369404016924280f730377d37fbaac0e93777
font_01_sfnt_off00010d5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5E 10700 bytes
SHA-256: 49372daa7ea7c48fff48b14c9ec5133f2f6a0f78f9565b89ba42567c31998045
font_02_sfnt_off000125a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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