Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d467daae8a3fc8e…

MALICIOUS

PDF

67.9 KB Created: 2021-09-09 13:44:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 70a627b9249d366200376ebc65552000 SHA-1: d8c4b1ada9c56b75a1c5297b855a18283b3a089c SHA-256: 6d467daae8a3fc8efe4b9052a7b420544f4606bbdbd978689afd26406f0b3c02
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm with numerous disposable hosting links, suggesting a phishing or malware distribution scheme. The embedded URLs, despite some being marked benign, contribute to the overall suspicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7088

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://rm-centr.ru/uploads/file/nenedamokutotuxowesaja.pdf In PDF document text
    • http://kashima.cc/userfiles/file/ludosoriwuzun.pdfIn PDF document text
    • http://law885995.com/upload/fckimages/file/pebanorununiraboxofet.pdfIn PDF document text
    • http://105chers.netsociality.com/upload/files/45782354291.pdfIn PDF document text
    • https://brawlcall.com/ckfinder/userfiles/files/mazoge.pdfIn PDF document text
    • https://tattica.byespresso.com/app/webroot/files/upload/files/nifivowokakibupuxif.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/lejeviwoberapo.pdfIn PDF document text
    • http://thienlongadv.com/upload/files/gofuzetezobibozasal.pdfIn PDF document text
    • http://sgo-bage.com/public/files/files/nevijire.pdfIn PDF document text
    • https://datenglagi.com/contents/files/divapudusakopo.pdfIn PDF document text
    • http://akcihlar.cz/userfiles/file/12525966044.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/95973014042.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/wizadatewowa.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161318f480438c---17576402920.pdfIn PDF document text
    • http://vallovin.it/userfiles/files/gojedolisepujaku.pdfIn PDF document text
    • http://kxqcgs.com/filespath/files/20210904065303.pdfIn PDF document text
    • http://elcolono.net/userfiles/files/kedavuj.pdfIn PDF document text
    • http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/mapekexepujakibevagi.pdfIn PDF document text
    • http://stroytehcentr.ru/images/file/26985245101.pdfIn PDF document text
    • http://dedanskecasinoer.dk/userfiles/file/39690116491.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/1817949390.pdfIn PDF document text
    • https://lekkermooi.nl/userfiles/file/jikiterojosokazo.pdfIn PDF document text
    • http://goodwill.pl/userfiles/file/fifizixabok.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/1087949620.pdfIn PDF document text
    • http://worldprint.su/userfiles/file/80378988047.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=linux+based+android+osPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BD 10396 bytes
SHA-256: 3cf03384e67b4b0402fb551bee35e1096dfa828e574a89de5f42bc1de297b5b3