Malicious PDF — malware analysis report

Static analysis result for SHA-256 862e016f6633cc5e…

MALICIOUS

PDF

80.0 KB Created: 2021-08-12 15:01:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d4be83234bcefcdbf5f9e540f3d572d8 SHA-1: e8f657b2db47d792d6408e6d33df4f706c2d755b SHA-256: 862e016f6633cc5ee66a5e1ba576f2916c4f5629a1017b31b5dabaa1d5e55dbe
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites hosted on compromised WordPress installations and disposable domains, indicating a link farm designed to distribute malicious content or phish users. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to obscure the true destination and potentially improve search engine ranking for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6637

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://archism.ru/uplcv?utm_term=o+que+comer+depois+do+jejum+intermitente+12h PDF link annotation
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba91d282fb6---10822006020.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/77786904396.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096b71a0e058---10005105030.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///81764683646.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16104745e0d6b0---pebezaxapinuv.pdfIn PDF document text
    • http://markone-tools.com/upload/files/46524798448.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160d4f184cbe65---xopewesorexobajadoxukij.pdfIn PDF document text
    • http://flywings.sk/UserFiles/file/dumodoturukeg.pdfIn PDF document text
    • http://cleanyachts.it/writable/public/userfiles/file/9379568885.pdfIn PDF document text
    • https://servicepapik.ro/files/bekulis.pdfIn PDF document text
    • https://netiko.ge/img/Data/file/tixodazez.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/512c94e66ee13c1b737cf8ad69bf5dfa/vipudiwuxofejisuki.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/pugugogiwuke.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160818287d0831---42226483871.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/c7c86dfbaa113adf708a4fe81b4824ee/mefugapajozuxanot.pdfIn PDF document text
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/makimesawusezifemob.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/edvikiai3ggpq9obc0apeslen6/60472837319.pdfIn PDF document text
    • http://asja.ua/userfiles/file/37220657284.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608842c500406---roviruno.pdfIn PDF document text
    • http://oilandgaswork.com/userfiles/file/84458492744.pdfIn PDF document text
    • https://nacituran.com/userfiles/file/juxamewa.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608be4f2f0ac0---69981876991.pdfIn PDF document text
    • http://federalwayhighschoolclassof1970.com/clients/8/8c/8ce2019516a67423f07d8eefa67dd611/File/92192780507.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160804b2bb6573---kosafuxavapugozabevigopi.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160be5943e32bd---kutibasisiwuxidoj.pdfIn PDF document text
    • http://www.pantonerestauri.com/ckfinder/userfiles/files/widasuxutuwogoranarawatef.pdfIn PDF document text
    • 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_off000102dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DD 19304 bytes
SHA-256: 147c1cdb0cdc2c89428e42dcc8c17e85ff5ae3fd42d016dc074188e0ece5386a