Malicious PDF — malware analysis report

Static analysis result for SHA-256 29152b4d2573bbc5…

MALICIOUS

PDF

90.3 KB Created: 2021-09-01 12:14:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1e38c432f6c38f520e2e30a06eba2672 SHA-1: 68ecbd92fb1738f97ad2fd6cbcfc64fa8404c1b0 SHA-256: 29152b4d2573bbc5ca363b5fdee4adbe6b752ff4ef248a484c309b4c22cffc6f
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 Pdf.Phishing.Trojan. The file contains numerous links, many pointing to compromised WordPress upload storage and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to trick users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://locoffice.ru/userfiles/file/67828162204.pdf In PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a12a876ea09---difanifazemusufub.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/dafekewomi.pdfIn PDF document text
    • http://fzsvybbs.at/userfiles/file/8370817668.pdfIn PDF document text
    • https://langestrand.se/anvandarbilder/204/files/vevirotuxi.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081809fb3acf---35391759156.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/20087dc0f17722c94ed8070cc23ce6d3/83447416376.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/vukufapevajefaver.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/95548956698.pdfIn PDF document text
    • https://dalnoboy.com/data/filestorage/upload/files/vibanunaxekazemewilalelef.pdfIn PDF document text
    • http://ex2010.com/uploadfile/file/2021090114333973499.pdfIn PDF document text
    • https://a-metal.e-giant.net/archive/file/files/gesuvirerumira.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/91302773856.pdfIn PDF document text
    • http://mamam.by/upload/File/file/48495196976.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160710236cb368---88961960315.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084e3f8852d5---kiniwekakezetanerevefilov.pdfIn PDF document text
    • https://www.benkorner.nl/admin/library/ckfinder/userfiles/files/tugefalax.pdfIn PDF document text
    • http://enslev-anlaegsservice.dk/userfiles/file/kamudigudujiwuv.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608365bd1c301---78687380273.pdfIn PDF document text
    • http://gwtcs.org/Content/uploads/files/zikofolikisujukuvuxegoset.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/83eb07e60ba53997ab8ec8b0a3629f33/newufuvizovadiwitomonufu.pdfIn PDF document text
    • http://phubozena.pl/userfiles/file/mukajivukolewemazalapomej.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d01b264f395---redelase.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/37305467811.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=was+not+declared+in+this+scopePDF 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_off0000fbe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE6 17596 bytes
SHA-256: e04ca0553f8bf2e8712ee37dc499d3a82e217ab5d68d1336a7277b5fbc71d562
font_01_sfnt_off000129d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000141ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141ED 10604 bytes
SHA-256: 015cd1c8b52b2f88e132ad4640afb919a1c2c9984045614bfd3325e756e7681a

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