Malicious PDF — malware analysis report

Static analysis result for SHA-256 64762e2ba8a27d6c…

MALICIOUS

PDF

63.5 KB Created: 2021-09-12 12:46:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6b8481c19090fdb2cfc36d0433bbc8fa SHA-1: b135fc10e6105284cd5a9b02a158c2112027a05f SHA-256: 64762e2ba8a27d6c1ea4916b178d3c29b5fc0279c06e93a98355ee242e9e19db
154 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 URLs pointing to potentially compromised websites or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms strongly supports the attack pattern of luring users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5107

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 https://crysiq.ru/uplcv?utm_term=what+phones+have+fortnite PDF link annotation
    • http://caerulumpharma.com/upload/files/ladinubezogofejuliropedis.pdfIn PDF document text
    • http://frutapacargentina.com/ckfinder/userfiles/files/kibekarukelibupire.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130ad7279e1d---57785699335.pdfIn PDF document text
    • http://studiopol.com/userfiles/files/gumabodajobele.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/dilida.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/duzojigoranezitidepo.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/1141517838.pdfIn PDF document text
    • https://k85shj16h-561lt.com/contents/files/52952994902.pdfIn PDF document text
    • https://skopjemuzikon.pmgrecordings.com/ckfinder/userfiles/files/69104136996.pdfIn PDF document text
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/25771156932.pdfIn PDF document text
    • http://profil-metall.de/content/uploads/file/35030566241.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd22e47ca0---vudimosejazujazetuw.pdfIn PDF document text
    • https://equator-maritime.com/userfiles/file/vinuwexisavitokijadesu.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135418b23e2a---39586634832.pdfIn PDF document text
    • http://lynxitservices.com/ckfinder/userfiles/files/bakunipekawerufamu.pdfIn PDF document text
    • http://immobilier-valence-agen.com/userfiles/file/wejugipikikibeze.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/6lgk0dumgn1k0hb54h6fn6i220/tavuzuxa.pdfIn PDF document text
    • http://moscreen.in/cmsfiles/file/97344930560.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/6494807359.pdfIn PDF document text
    • http://gewald.ru/content/Files/59465670300.pdfIn PDF document text
    • http://jjsgreatescape.com/uploaded_files/userfiles/files/8860884082.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/43480265478.pdfIn PDF document text
    • https://augsburger-dartliga.de/uploads/file/fusudakekubipinovuwiga.pdfIn PDF document text
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/25573998861.pdfIn PDF document text
    • http://nwatchonline.com/userfiles/file/76216731245.pdfIn PDF document text
    • http://fulns.com/uploadfile/fckedit/file/1630965111uQDV.pdfIn PDF document text
    • 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_off0000b4a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ccb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB9 15228 bytes
SHA-256: 28dcb6ea56d7f8911e13665faacd4090f8197b0f3d2a51ef2fac122b54cd9906