Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4488ea4149a14c0…

MALICIOUS

PDF

72.0 KB Created: 2021-09-13 06:37:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: e7edb2b2008cf337a91e3f80fcf2444e SHA-1: f1861ac6b6581c0f3a2c326b5d6b6c4e1473eeb3 SHA-256: e4488ea4149a14c0bfd2eeb429831a347cafe1834803774905906dcc83f0b26e
124 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely to lure users to phishing or malware distribution sites. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2573

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://hoteldazegliotorino.com/userfiles/files/59321748577.pdf In PDF document text
    • http://studiocalcinoni.com/userfiles/files/gexajitumanukuv.pdfIn PDF document text
    • http://resortcrimea.com/ckfinder/userfiles/files/jarojavowu.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/3f794b0eb7baa88cb36b14179f82a507/sazoruda.pdfIn PDF document text
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/pawimakizomab.pdfIn PDF document text
    • https://shiprapublication.com/uniformkontakt/userfiles/image/files/gakevumopuwisabobedib.pdfIn PDF document text
    • http://15881588.com/ckupload/files/75461447197.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/67580862366.pdfIn PDF document text
    • http://gaestehaus-am-erlkoenig.de/img/editor/file/bepirenenan.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/liwixosabotef.pdfIn PDF document text
    • https://macauroommate.com/ckfinder/userfiles/files/92667288168.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/f2432ce220bc8d5503bdbb8527d629a2/bumonifanelugijeguzun.pdfIn PDF document text
    • https://buddhaart.in/userfiles/file/15014872578.pdfIn PDF document text
    • https://www.agcontraincendios.es/ckfinder/userfiles/files/lironoru.pdfIn PDF document text
    • http://canavesiobruno-architetti.it/userfiles/files/72298296264.pdfIn PDF document text
    • http://re-media.ru/foto/ck/files/folix.pdfIn PDF document text
    • https://geniodelweb.com/file/80906937540.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/98393708351.pdfIn PDF document text
    • https://egc.ecrom.work/syo/files/revodasokexewowu.pdfIn PDF document text
    • http://theloanwala.com/userfiles/file/5852826014.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16131f80b9de85---40746917204.pdfIn PDF document text
    • https://ta-taiwan.com/app/webroot/userfiles/files/todolez.pdfIn PDF document text
    • http://ephtour.com/FileData/ckfinder/files/20210911_C9D0437B019E3539.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/zuzaxitanudakekuvujepe.pdfIn PDF document text
    • https://cfacgroup.com/uploads/FCK_files/file/99141294200.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/gijatuxuxukemubes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=elemental+dungeon+mod+apkPDF 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_off0000e108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE108 10548 bytes
SHA-256: d3b51044a7813ccb126c4bac5e8eaba62da3b78c68d274e6569545e1dd3565b3
font_01_sfnt_off0000f8d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1