Malicious PDF — malware analysis report

Static analysis result for SHA-256 65f9be7c081e116f…

MALICIOUS

PDF

100.9 KB Created: 2021-07-06 03:58:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 27cae093d4cabc615303399c8317248a SHA-1: 82e1b3b02b50f792a64e469b73b570305b8a2d91 SHA-256: 65f9be7c081e116fc43b351dd3a65515278e144662d4573a34646e214e2b09d9
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URIs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this attack pattern. No scripts were extracted, but the overall structure suggests a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/b8gg2j39j8p9qggch34lfhalrd/87562295069.pdf In PDF document text
    • https://okna-kurska.ru/page_edit/_samples/userfiles/files/93420967393.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/68lcfnnaf9qtk1hj4kfpngp722/fujemubinupojeg.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/ravotojebuf.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/51lfo0g5go30307ssrgo63pgc6/toxajupeges.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160854df1009b5---94960817932.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/94290963523.pdfIn PDF document text
    • http://ecandrychow.pl/Image/files/ximaroxejo.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/fatoxawo.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086383fef518---pulaketovupa.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b29da128f9e---75249454849.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160b44e5b3fd58---julexoxaseg.pdfPDF link annotation
    • http://angkortaxiservice.com/userfiles/file/28355815759.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5076429a4---jurusomup.pdfIn PDF document text
    • http://1night2day.com/ckupload/files/sexalivemotib.pdfIn PDF document text
    • http://cesnek-vysocina.cz/UserFiles/File/nitipowinifof.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/tibolawepivetameju.pdfIn PDF document text
    • http://bluebirdcanada.com/FileData/ckfinder/files/20210603_D15F0CD611C3DE37.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/04824ad8d2957c2dd890f3b9f3c8ac75/mokuf.pdfIn PDF document text
    • http://e-hane.com/files/gepiwopexilagogisif.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858f260417c---dedofagi.pdfIn PDF document text
    • http://mopron.ru/upload/files/83610236890.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=cost+concepts+in+managerial+economicsPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12598 10748 bytes
SHA-256: e38af10767053514d8d676921fd8bbf642a70f32c09039ca3eb0fb50a7901df1
font_01_sfnt_off00013e4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E4B 18216 bytes
SHA-256: d106a9a5ddf4ab3516664e5db9e91d3fc7771a17dc9a6ce6901745e89ac864cb
font_02_sfnt_off00016dee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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