Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc0e00a50da55748…

MALICIOUS

PDF

71.6 KB Created: 2021-09-17 22:04:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 542ce4bd94d26fca08c976cf9a6344b1 SHA-1: e870dd5c7125307b0908749b0879a8d56e5610ce SHA-256: cc0e00a50da55748c577aadb74c73321594a928d475b0d1f0282e87cb84861f9
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent, likely to lure users to phishing sites or potentially download further malware. The document body is heavily obfuscated and appears to be non-readable content generated by wkhtmltopdf, providing no direct user-facing lure.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4785

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://alda.pl/ckfinder/userfiles/files/kasite.pdf In PDF document text
    • https://encoyun.com/calisma2/files/uploads/12122601680.pdfIn PDF document text
    • http://envigest.cz/upload/file/14546040652.pdfIn PDF document text
    • https://www.solucionaesp.com/ckfinder/userfiles/files/jalasojawedaxazofajexov.pdfIn PDF document text
    • http://biancoacolori.it/userfiles/files/susegupak.pdfIn PDF document text
    • http://mfo-fond.ru/ckeditor/ckfinder/userfiles/Images/files/pazovawomadutugepofowo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141fd6014036---7403853125.pdfIn PDF document text
    • https://sanaspinler.net/calisma2/files/uploads/vebisoziril.pdfIn PDF document text
    • http://fuzoku-kyujin.jp/ckfinder/userfiles/files/nevagevixasurasuwuduzup.pdfIn PDF document text
    • http://movitecnic.com/ressource/site-image/files/32829975961.pdfIn PDF document text
    • http://pnalog.ru/images/file/54431908645.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/161335235de46d---49897918161.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16131d51d0727d---volevebezu.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/zulujimonorolid.pdfIn PDF document text
    • http://elma1.ru/!upload/files/49082359443.pdfIn PDF document text
    • http://hangnhatbanonline.com/upload/files/49244542197.pdfIn PDF document text
    • http://chromavials.com/d/files/lovigowogawuku.pdfIn PDF document text
    • https://www.area-tlc.com/public/ckfinder/userfiles/files/59446994985.pdfIn PDF document text
    • https://economiadecomunion.com/ckfinder/userfiles/files/pijitibilidipuf.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/161438e6ace517---7523374881.pdfIn PDF document text
    • https://www.igescanada.com/ckfinder/userfiles/files/gekadogexatalavop.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/17094016840.pdfIn PDF document text
    • https://devcons.org/uploads/userfiles/files/mojojuxu.pdfIn PDF document text
    • https://xn--lenachatka-57b.pl/uploaded/file/27262045738.pdfIn PDF document text
    • http://www.gieskestukadoors.nl/ckfinder/files/files/2168587348.pdfIn PDF document text
    • https://mercerapparelss.com/userfiles/files/70372196320.pdfIn PDF document text
    • http://d2dgroup.net/upload/files/desimosefalibuwemerud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=escapades+with+friends+2016+full+movie+watch+onlinePDF 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_off0000dd89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1