Malicious PDF — malware analysis report

Static analysis result for SHA-256 faf0ee6500da3030…

MALICIOUS

PDF

87.4 KB Created: 2021-09-12 21:59:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c57aba76c927605112e854c81a3c65f5 SHA-1: ffb285a65dc287cc9cf01458c576f11e63c006fd SHA-256: faf0ee6500da303034849fac1e6f3ad5ffd4235c13569bd9d4e6a6c1ab001988
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a link farm on disposable hosting. The embedded URLs, such as https://garglob.ru/uplcv?utm_term=iphone+activation+lock+bypass+tool, suggest a phishing or scam attempt, likely related to bypassing activation locks. Although no scripts were explicitly extracted, the PDF structure and numerous external links point towards a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://garglob.ru/uplcv?utm_term=iphone+activation+lock+bypass+tool PDF link annotation
    • https://ubk-sad.de/azubi/userfiles/files/rumizosamezizew.pdfIn PDF document text
    • https://efficimm.fr/userfiles/files/70485970877.pdfIn PDF document text
    • http://ddaengshop.com/ckupload/files/22649953435.pdfIn PDF document text
    • http://studiopetrilli.it/userfiles/files/piponitatixi.pdfIn PDF document text
    • http://modamoda.nl/uploads/pic_lib/file/vidufikumadogena.pdfIn PDF document text
    • http://net-marketing.hu/images/files/81989197484.pdfIn PDF document text
    • http://byecook.com/ckupload/files/22609438600.pdfIn PDF document text
    • http://revize-elektro.info/UserFiles/File/41568539018.pdfIn PDF document text
    • http://strandedtattoo.info/file/wuforifumukugebofalexes.pdfIn PDF document text
    • http://nguyenphat.com/public/default/ckeditor/files/59032000053.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/zefafiwepojinu.pdfIn PDF document text
    • http://sanchariglobal.com/userfiles/file/93970984136.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///47731894571.pdfIn PDF document text
    • https://www.akilciilacdernegi.com/ckfinder/userfiles/files/98533304698.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/zokozogiwefijuvinuxe.pdfIn PDF document text
    • https://kamionosnyelvlecke.hu/userfiles/file/2758906216.pdfIn PDF document text
    • http://nb-magnet.com/upload/files/vimefosizotuvad.pdfIn PDF document text
    • http://vcelari.naceradec.cz/includes/ckfinder/userfiles/files/92189085189.pdfIn PDF document text
    • http://pravkniga.ru/files/userfiles/files/26764570759.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/61727396396.pdfIn PDF document text
    • https://isigakizima.net/img/tmp/file/gejaneropiduvutafezoke.pdfIn PDF document text
    • http://quinta.cl/upload/files/20544925906.pdfIn PDF document text
    • http://ziconiavip.com/uploadfck/file/fatanuxutewefakudoj.pdfIn PDF document text
    • https://cevhertemizlik.com/userfiles/files/pajakudetorepufolokipo.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16133bbc8ebfca---21205651138.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_off0000f1d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D0 10736 bytes
SHA-256: 8069da869601c69e15dc56b92f9ebc44de2166f69a771e29a9f66faa8b1bbae7
font_01_sfnt_off00010a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3B 17820 bytes
SHA-256: d37916cacc2fc33646839377339fc001fe7fe187e0e8b23bd2c2a0381e9e8a7a
font_02_sfnt_off0001381d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1381D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1