Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b26128e081703f5…

MALICIOUS

PDF

72.3 KB Created: 2021-06-29 14:45:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: eec53a7abe85085623185df23ef8a35e SHA-1: ffc6d95e4be98bbb4a613d087a659bdeb976bf35 SHA-256: 3b26128e081703f567f05ab333c494974647a18952a7a2fec2c7f1af37b347f1
154 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites. The primary purpose appears to be directing users to malicious content hosted on these compromised sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8257

Heuristics 5

  • 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
  • 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://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d958f8c26aa---dipupagemezovinazomad.pdf In PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/imf190k34312k610j9snb38vep/69689912404.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/6ac9c203d969b7177a65358b04fc44d5/88360948972.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/2b4a8842515bc54b3a16fc58a7b74b6f/64168897575.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/nufuraju.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607082b0a2182---molabivukobudasivebu.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c09d53b64a5---sadorumipexiwojokuzuma.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/99076832711.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/vexexepidolopilogesobug.pdfIn PDF document text
    • http://riverbendhay.com/clients/4/4e/4e1cbd84181290ddb66fb035c9950ff6/File/faviw.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/fs3158ds0le9fbcgo9d5tcsa9r/birewiwu.pdfIn PDF document text
    • https://galerie-louise.be/userfiles/files/16036526704.pdfIn PDF document text
    • http://novichiha.ru/pic/file/vovuvewoxose.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160707690f1d3d---dagixutozozove.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acb9ec58666---86847442931.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/94417439610.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/kuper.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/a31798f6d605c136a13012abdd454a97/pawujasipubusizipobororub.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/aafb2f7cf584dfd7e0a03beb965edca8/89469757558.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/0e1574acda2b28b42c0aa25ae54c56fa/jatuzosuxigox.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b6274ed64ce2184eecef7e83d8f875e4/zunopebukoxisexepe.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/xefodojaxetamaran.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/ff34fdda5fba138f6f72e2dc709a7dd9/11263902563.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/2b65c8bda1d95190215f28cb1da3ed22/bukufiges.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/e1240b4fa4de346896a3c73515b816f3/rojewozorebij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=synchronize+audio+and+videoPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C4 10572 bytes
SHA-256: 832e9a450de30093b47f1f9900167efad4c7e692ea531808b40f55731ed7d894
font_01_sfnt_off000101de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1