Malicious PDF — malware analysis report

Static analysis result for SHA-256 262c8a2c6806fa48…

MALICIOUS

PDF

83.0 KB Created: 2021-09-14 03:49:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f1602c1d1cc66a8e7c3072766d6d9fd4 SHA-1: ca94cc5ef668f3d7c823f5221931fe78d05ae922 SHA-256: 262c8a2c6806fa48de882632751a0adcb06144038c31ae1386a9418f232b035f
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Forge Credentials

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or credential harvesting lure. The heuristic 'SE_MFA_LURE' indicates the document's content is designed to trick users into providing sensitive information like one-time codes or MFA approvals. While no scripts were directly extracted, the PDF structure and numerous embedded URLs suggest an attempt to redirect users to phishing sites, aligning with credential theft tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://okna-kursk.ru/page_edit/_samples/userfiles/files/ruxirupexotefogediw.pdf In PDF document text
    • http://klhl.com/userfiles/file/45830859913.pdfIn PDF document text
    • http://uitvaartverzorgingsindex.nl/images/uploads/zomuwifun.pdfIn PDF document text
    • https://jotekonybakterium.hu/userfiles/files/10423638986.pdfIn PDF document text
    • https://turkuazhost.com/calisma2/files/uploads/rujiped.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/82884650621.pdfIn PDF document text
    • http://wangyiphk.com/userfiles/65209166218.pdfIn PDF document text
    • http://kdwatch.net/upload/files/2021090418103068.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161378985534c9---10961839952.pdfIn PDF document text
    • http://georgewongdesign.com/gwd/upload/files/11918453370.pdfIn PDF document text
    • https://brazilairporttransfers.com/ckfinder/userfiles/files/kusizegevisidowo.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130c3ee777b8---dotizixigebebakexomag.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/goxinorereju.pdfIn PDF document text
    • http://manuale.aziendasulweb.it/userfiles/files/pemogana.pdfIn PDF document text
    • http://chinalabware.net/d/files/30986100738.pdfIn PDF document text
    • https://badanie-wody.pl/galeria/file/19043906542.pdfIn PDF document text
    • http://wamaeassociates.com/images/uploads/originals/file/14804911498.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210913_070454.pdfIn PDF document text
    • https://transilvaniafishing.ro/app/webroot/files/userfiles/files/10940553138.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/muguxivudesekaxijezopan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=facetime+imo+androidPDF 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_off0000e32e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32E 10292 bytes
SHA-256: f3862a3c387462fc5696099d98398bdf866604a0e5c0d61382629e9f996ea60a
font_01_sfnt_off0000fa50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11262 17208 bytes
SHA-256: 5aaed5d27c3679a7c30ab8ad626b0539ed6461c463f82c11b76bc27878de65b0