Malicious PDF — malware analysis report

Static analysis result for SHA-256 268bd38acee95902…

MALICIOUS

PDF

80.2 KB Created: 2021-09-14 08:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 521727588546f5b9213901a4c9db8f77 SHA-1: cd1ea85a892a24f921097c05c55b5cfe747a6220 SHA-256: 268bd38acee9590247e19b4b797b5b9060a85ded2a32039f933cb26dacd795c5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to external sites, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this by indicating the PDF is a link farm on disposable hosting, designed to obscure the true destination.

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 http://www.mezmat.ru/ckfinder/userfiles/files/pubejusibidekejetivawam.pdf In PDF document text
    • http://astorandblack.net/emailer/userfiles/file/33687221995.pdfIn PDF document text
    • http://scvumaichiramen.com/uploads/files/26397320390.pdfIn PDF document text
    • http://www.pzkexie.com/up_files/file/48110366839.pdfIn PDF document text
    • http://albertopizzetti.it/userfiles/files/10640230801.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d0dc7f1b77---51409765800.pdfIn PDF document text
    • http://szkolaprzybranowo.pl/ckfinder/userfiles/files/sowosetinijuvi.pdfIn PDF document text
    • https://52fantasies.com/home/holly/public_html/ckfinder/userfiles/files/webekofubi.pdfIn PDF document text
    • http://oppedisanorobertosrl.com/userfiles/files/74018281843.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ed90b1f1fe---doxoroz.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/88004990512.pdfIn PDF document text
    • https://treasurehunterdetectors.com/ckfinder/userfiles/files/jonejanisa.pdfIn PDF document text
    • https://www.chablis-gautherin.com/ckfinder/userfiles/files/bofokexexafexolisu.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/kezijugepanaxawukebusipo.pdfIn PDF document text
    • https://hawkseyetravels.com/assets/ckfinder/userfiles/files/13958233211.pdfIn PDF document text
    • http://harnettcountyhba.com/userfiles/file/49137936469.pdfIn PDF document text
    • http://vinhthuan.com/upload/files/nalujaxudokeledoz.pdfIn PDF document text
    • http://nmways.com/uploads/fckupload/file/bidekosemu.pdfIn PDF document text
    • http://bagodilovaspark.hu/userfiles/file/wotixexeter.pdfIn PDF document text
    • http://h-p-n.fr/catalogue_dynamique/file/7515538430.pdfIn PDF document text
    • http://votava2.altrodesign.eu/ckfinder/userfiles/files/kamuxoxosuwek.pdfIn PDF document text
    • https://itscebu.com/upload/file/20210906100001.pdfIn PDF document text
    • http://siamsnail.com/media/userfiles/files/lowajopu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=watch+icarly+onlinePDF 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_off0000d670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD670 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE82 17844 bytes
SHA-256: 51727918dab4a3765ba3464cc6a081e2277cc0671843b7ed05f7a3491b799cc1
font_02_sfnt_off00011ca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA8 10268 bytes
SHA-256: 7341e9fc5d093677ad3b1a291485864514fef1b7836a2108841326e9dc830093

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