Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae7bcc051e3e1849…

MALICIOUS

PDF

76.8 KB Created: 2021-08-25 08:44:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: e70b4d30f373871f8e88df81ceced2cf SHA-1: fdbf776bb86b3e74ee24f5db50d33cecc270ad3d SHA-256: ae7bcc051e3e184944ceffa7b637fbc891b0237451d10f34b119c80fca6ea1f9
154 Risk Score

Malware Insights

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

The PDF file contains a link farm, directing users to multiple external URLs. Several of these URLs point to compromised WordPress upload directories, indicating a potential phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7677

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://visit-pune.com/userfiles/file/2626939216.pdf In PDF document text
    • http://cancunday.com/travela/img/files/41643725763.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/47b56f3576e3c087528a026fce032276/23900127024.pdfIn PDF document text
    • http://hnsunnyfood.com/d/files/7077359669.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/lfcm39lp7q7uor6nooo0u7acpt/38427280035.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/cl7kip2mi0v6gdtfqlch2r1pq6/xofidam.pdfIn PDF document text
    • http://tivatijapan.com/uploads/userfiles/file/jelazedenivo.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/c23d415f118bcbbc56dbbcc59a0981d0/17218295115.pdfIn PDF document text
    • http://cnmrobotics.com/files/files/98016656854.pdfIn PDF document text
    • https://www.blondel-bois.fr/ckfinder/userfiles/files/84054583987.pdfIn PDF document text
    • http://elitvorota.ru/f/file/1699354644.pdfIn PDF document text
    • http://yunnanyingxiang.com/ckfinder/userfiles/files/8789596344.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/704a9c8509621b413700b1c67936daac/gifuwabagonovofuvojo.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a67da6df0ad---mevebivena.pdfIn PDF document text
    • http://theclubburger.com/uploads/files/nenonamaretek.pdfIn PDF document text
    • http://haciogullari.com/depo/sayfaresim/file/kibovuvujapuzepefenis.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/30enngsm3h054nkqb5if6n1si5/babuv.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa248e8e61---vanulefenoja.pdfIn PDF document text
    • http://tokyosushilohaus.com/uploads/files/zavimifororebega.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/medotizeka.pdfIn PDF document text
    • https://mosallaesf.ir/uploads/ck/files/77215128341.pdfIn PDF document text
    • http://wccflooring.com/userfiles/files/divugijogasu.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160773d6480ca2---24845489252.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=bses+view+current+billPDF 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_off0000eb83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB83 18336 bytes
SHA-256: 03d3c1616fba66b7ec9386a6c6548847b30dce1e680f1092256bdf1b75fa705a
font_01_sfnt_off00011b44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1