Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3c25568fdf2aa43…

MALICIOUS

PDF

85.6 KB Created: 2021-08-14 15:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: d5a77e90c0dbaeda8410a12646625b6c SHA-1: 9ca7bb0b070ee6c2d4eca0a9bd29e3ac3d1de7b2 SHA-256: e3c25568fdf2aa437817912ddf93025020b41613d80ed9513c7882c0627e7606
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 http://www.elstar.ru/uploads/files/72693859190.pdf In PDF document text
    • http://101balkon.ru/upload/files/30920703867.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/45917810452.pdfIn PDF document text
    • http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/29390532489.pdfIn PDF document text
    • http://loaamtran.com/files/usersfiles/files/30794800342.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609a026cf3061---xujeres.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607580c4c6056---vapejemamaximizovafe.pdfIn PDF document text
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/31590336586.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/53994409540.pdfIn PDF document text
    • http://bestofbeer.ru/ckfinder/userfiles/files/3842719650.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/luvoturemazabawubozatiz.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f101480f6---godukoxoxekupanoja.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff92b5a4768---xibibitemekexabada.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0cb62d19a---nozezoduwamarafotiwiliwil.pdfIn PDF document text
    • http://xn--9w3b11kh5l.com/ckupload/files/99732846203.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/87q4vappcklp6635ive10ht4hl/kuzuduvobem.pdfIn PDF document text
    • https://www.myosiaffiliate.com/199trust/img/file/zogunebikisilaxunog.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/zuvebuke.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f30b62714---pegis.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/fetotamivugovobudi.pdfIn PDF document text
    • http://minhtoangalaxyhotel.vn/app/webroot/files/ckfinder/files/99416614685.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/tugeredepedeladeri.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=diferencia+entre+monosacaridos+disacaridos+y+polisac%C3%A1ridosPDF link annotation
    • 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_off0000e596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE596 17928 bytes
SHA-256: 31062bc5be8ba6b450bed8e38fec98d0950aa9f6ede610dc01c6eea34862c882
font_01_sfnt_off00011399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11399 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012bb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB0 11076 bytes
SHA-256: 223c1328c13b6b76e4c08e4499cad24adcb59fcfdd91d056d6daa71254bfadf0

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