Malicious PDF — malware analysis report

Static analysis result for SHA-256 4260712a46e4bd63…

MALICIOUS

PDF

69.3 KB Created: 2021-08-20 18:58:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b84abd37f6ffa7dac38344bdc0d8aa15 SHA-1: f5de5abd104fba4d4eddc8e049116e9806809ff6 SHA-256: 4260712a46e4bd6397c030836aa445e661bc9be8a62cafb62bff3a44bd850668
124 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV, specifically as a phishing trojan. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to various websites. Several of these URLs are hosted on compromised WordPress installations, indicating a potential distribution or phishing campaign.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4539

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://chcial.ru/uplcv?utm_term=how+to+download+private+tiktok+videos+without+watermark PDF link annotation
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/543a0cfc3f01cda1f5a5cac97624b3d0/74413045469.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/javusamurajivamafagutezi.pdfIn PDF document text
    • http://mrsinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/bepuka.pdfIn PDF document text
    • http://pantipplaza.com/userfiles/file/35803524199.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5ea1d0d1b---81391803843.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/u80ork3evheo0mte5dtq09m2gr/80430173046.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ccd95422c---belotid.pdfIn PDF document text
    • https://aptitudeclass.com/ckfinder/userfiles/files/79927980337.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/tujeratajosoniz.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/4a65c8800a317b29780208781dbc58b8/vegumin.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/ddca42aecdaa6111fdec89e04195c27d/84069746941.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/bc5e008f0b723fc5fac65c6dce702591/ginetibumafajaler.pdfIn PDF document text
    • http://cisseo.net/userfiles/files/79325278479.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/tabededinosibulusodapufem.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e42e2326dc1---3701718628.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/rufopodivugonoter.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/3d63c096c950c48b2512b745b5b306d3/vemalopitorijekexetoduw.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/a90e43e43d36b7c5a5f3186ed46fc2e7/xufizelile.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/fgrds0m6njhif055t6gi1ob1ap/xotibumabo.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079bd3ce024b---punotabifitu.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160788c9cf0aca---856796667.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/lepogijirerepusav.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/62003236976.pdfIn PDF document text
    • 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_off0000df19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF19 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF730 10992 bytes
SHA-256: c3f0cfb32b5c121da3f6b6e3105b00d63158e2fe51119792af5c86d709f54d9f