Malicious PDF — malware analysis report

Static analysis result for SHA-256 63597fed4624d7b7…

MALICIOUS

PDF

62.5 KB Created: 2021-09-09 07:48:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c6a0536c0dc49a85a1cd4fe379a09d9f SHA-1: 33cf60de686e34b514f18a94287cb303933d645f SHA-256: 63597fed4624d7b7940143583a71bf09390564934ab4310e5af44059abc0b705
154 Risk Score

Malware Insights

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

This PDF was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to external sites, many of which are hosted on disposable domains or compromised CMS uploads. The primary purpose appears to be directing users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9260

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://tamlaproject.com/userData/board/file/3090543773.pdf In PDF document text
    • http://reguitti-engineering.it/userfiles/files/sokuludotazelarige.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/sovafomo.pdfIn PDF document text
    • http://octapus.vn/images/uploads/files/54494245312.pdfIn PDF document text
    • http://topenglish.sk/app/webroot/gallery/files/25113305618.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136f40ebd934---ruduloduwabaloke.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/sopulikine.pdfIn PDF document text
    • https://noticky.net/akce/fotky/file/64032942542.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/7703135947.pdfIn PDF document text
    • http://vaness-sens.fr/ckfinder/userfiles/files/suzakidedikufuxuvuvebu.pdfIn PDF document text
    • https://chrmglobal.com/userfiles/file/6276893512.pdfIn PDF document text
    • http://anapharmata.hu/ckfinder/core/connector/php/files/wufojufaxutefagage.pdfIn PDF document text
    • http://ominocoibaffi.it/userfiles/files/27718693702.pdfIn PDF document text
    • http://camonetinternational.com/files/file/217858112.pdfIn PDF document text
    • http://zhjpharm.com/upload/files/88167218008.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135683e30e38---89489472034.pdfIn PDF document text
    • https://gtnet-engine.com/ckfinder/userfiles/files/64875656397.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133763dca7d4---32556165082.pdfIn PDF document text
    • http://ms-domino.eu/images/file/files/pakowigidaxofate.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133c2a90cd53---nezomizizuzu.pdfIn PDF document text
    • http://dtyxbpzx.com/filespath/files/20210909074225.pdfIn PDF document text
    • https://pnp-studio.com/fckeditorfiles/file/makajefanatiliziligikolib.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/161393ee0766c7---82719545144.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613783b147ed5---lepapugodilamisinonoloniv.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/sadovuriperisalage.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=redmi+note+8+original+display+price+in+bangladeshPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE204 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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