Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f1cd7499f9afde9…

MALICIOUS

PDF

63.7 KB Created: 2021-07-26 02:09:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5c5c47f00b814fcb74106e75ea1b123a SHA-1: f97a3a9574ae35ca32be121e4c2e22446c01ac72 SHA-256: 4f1cd7499f9afde9fbfef9f0ab2f43fbd3b7eca569a13653293c65e89cce9b20
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it's part of a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly indicate malicious intent. The file's structure as a link farm is a common tactic for initial access via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7270

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 https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/12dd44bf2697713b120c13a8d63f795f/gibufezupitegiladib.pdf In PDF document text
    • http://metabolit-plus.ru/files/file/wezat.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/nn4udu8nroraiuc1jurochvkrd/31603086326.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/bc8465764c920412c3195a6f7a5991f2/jamojomodib.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a28860fcb---tekidisadasoja.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086dd32ecbf5---71044770087.pdfIn PDF document text
    • https://galerieportelouise.be/userfiles/files/fineputufazemiret.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087284629854---52645422395.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/4ec0ad790e9e0bb621055fa5d17f625a/63274746162.pdfIn PDF document text
    • http://bigsvatcharasith.com/userfiles/file/17049642518.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/4123528a0ebdac954071d2eb89a36331/wipinanakirakemuxo.pdfIn PDF document text
    • https://rockdental.co.uk/wp-content/plugins/super-forms/uploads/php/files/de0997d30db6ec20a201b6acbbb260d3/28615595317.pdfIn PDF document text
    • http://cgpreceptor.com/ckfinder/userfiles/files/bikomajanaxakoxut.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/5pldl0ocmgr0nfgllpbkjqlhc5/sukumipif.pdfIn PDF document text
    • http://clinicaveterinariacene.com/userfiles/files/36467848736.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16075f10455b5b---41232683687.pdfIn PDF document text
    • http://blessedfamilycovenant.org/clients/c/cb/cb727bc273eb4203dc66fb73741ae5ae/File/68226847366.pdfIn PDF document text
    • http://alwaysfavorentertainment.com/clients/879371/File/satodifomevejexikafogunur.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/11456819124.pdfIn PDF document text
    • https://ckmandarin.com/uploads/fupamegewume.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/atawigejofufufubox.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/rozefulub.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/5e15b78273f616d78669d581904c8ef1/kizalap.pdfIn PDF document text
    • http://doremimarlikinsaat.com/userfiles/file/16785202909.pdfIn PDF document text
    • http://www.celso.org/download/84059756447.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=debi+e+loide+3+filme+completo+dublado+online+gratisPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB5 11376 bytes
SHA-256: 43f96b0546e55455e22dff4e224c38908d45839066c420092c05efe35a50ed98