Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9f763044197411b…

MALICIOUS

PDF

72.6 KB Created: 2021-09-02 05:19:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 26f59385edb31503c9d317ae7af2a665 SHA-1: 13e0607f616c07a0d27d1cd961c9e642adafe80c SHA-256: a9f763044197411b89d5cf496cd3f841e684802048ef70480510cb52e8c98d9e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to malicious websites, likely for phishing or further malware delivery.

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 https://drafthe.ru/uplcv?utm_term=micronutrients+examples+in+food PDF link annotation
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/ab066aa3a42fe85eaf7fa8ae7ce30836/walitetopalupuxipivotudaw.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/goluduzel.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091cb1e87a29---15501360291.pdfIn PDF document text
    • https://norservis.info/files/files/bisedofipekab.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16094a149c8a26---68041548251.pdfIn PDF document text
    • http://ballstonfamilymedicine.com/clients/861402/File/pizej.pdfIn PDF document text
    • http://spzpoz-zdunskawola.pl/upload/file/33139888945.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/dilax.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1610bf51fe4b3e---karejarezovuxi.pdfIn PDF document text
    • http://skyfestival.kr/ckfinder/userfiles/files/69645751208.pdfIn PDF document text
    • https://alirezamirmohammadi.com/images/upload/files/tigunilakufiwekixoso.pdfIn PDF document text
    • https://xosobacninh.vn/webroot/img/files/11742366375.pdfIn PDF document text
    • https://takitech.hu/userfiles/file/55108050757.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/k3uq0ml2eejigvfv43qpn2opfc/2483900798.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/makawivonevililefovexox.pdfIn PDF document text
    • http://e3edu.vn/public/ckfinder/core/connector/php/connector.phppublic/uploadsfiles/mogamibadug.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/e42950eb4688b696edae0eff280dcf30/93346554730.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/wudozipokokotuwob.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/vibugebopubefided.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c579223791---rusimuluwobopimizogof.pdfIn PDF document text
    • http://fedime.org/imagenes/nufagonutitosirotido.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/8310119840.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

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_off0000bc29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC29 10976 bytes
SHA-256: e1bea43407f7b0962ef4b3287d2fb3fd9abd52185bbc285826c224154c01a7a2
font_01_sfnt_off0000d5ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AB 15420 bytes
SHA-256: 2bfe6a6fcdf4e11244b4119d13ccd7419c5a2c0537ef537ff68871d000f6b32c
font_02_sfnt_off0000fc94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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