Malicious PDF — malware analysis report

Static analysis result for SHA-256 64981a3879fc9beb…

MALICIOUS

PDF

75.3 KB Created: 2021-08-15 01:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 28222f0c7d62331e24ab961b51cf1c21 SHA-1: d9fde0b55a56064a86b4e5d6ca15e031be43b637 SHA-256: 64981a3879fc9bebdee930a68580769a229c1b1ecafade5f8adb9631cae77781
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a network of links for potentially deceptive purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://garglob.ru/uplcv?utm_term=teaching+missing+addends+2nd+grade PDF link annotation
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/vn4c4phi7e1sllri42df74vvfa/ridada.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/61806085277.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/63661955d566cb13fe8b4c98a4801b20/xegugejit.pdfIn PDF document text
    • http://meetburgerusa.com/uploads/files/besopixe.pdfIn PDF document text
    • http://whitedwarf.ru/public/images/ckfinder/files/39996287471.pdfIn PDF document text
    • https://maxlinder.com/admin/assets/ckfinder/userfiles/files/1499540237.pdfIn PDF document text
    • https://skyzoan.com/cake/beta/userfiles/file/96384147449.pdfIn PDF document text
    • http://studiopedrazzini.eu/userfiles/files/27267206982.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b662ee8f0b---rejijakar.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/rusujobuz.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/jr3ornjdqu3865qrq74a5903aa/lamajadesamafimivegekurez.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/bogagonezuwufi.pdfIn PDF document text
    • https://mytopics.it/uploads/file/vexuwij.pdfIn PDF document text
    • https://maturana.cl/upload/file/pafasafisizilak.pdfIn PDF document text
    • http://randygordonlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/43071761679.pdfIn PDF document text
    • http://uctodane.cz/UserFiles/File/nogevu.pdfIn PDF document text
    • http://recrute.fr/files/files/65623471268.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/c69a9bc1c397fcfa41b8d23884e59070/36578338746.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d316a61a7c---92120844135.pdfIn PDF document text
    • http://edanieltour.com/FileData/ckfinder/files/20210610_E7BED849CCDD380D.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c09585878f2---xanurekal.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/5e7aa17071e2163d5e0157d57dde68f2/98730241378.pdfIn PDF document text
    • https://rajatotogroup3.com/contents//files/kawireguz.pdfIn PDF document text
    • http://ugyvednok.hu/userfiles/file/dowadode.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC24C 10636 bytes
SHA-256: 08eb44cbf3709b215ac12ed1504e08fef7cc8be9ba03139f711e2f9d97582fe3
font_01_sfnt_off0000da3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3C 16772 bytes
SHA-256: 039dc42df82dcdf0f7fe0e33454c36291e800794a377dd0020e4a42cdd60cfa1
font_02_sfnt_off0001062e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.