Malicious PDF — malware analysis report

Static analysis result for SHA-256 0be8bcbaca1e07fd…

MALICIOUS

PDF

83.7 KB Created: 2021-09-12 02:09:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 80670de00c91db8fee376699de57b514 SHA-1: 55caea18d968083097d6fca211a05af281a5f5a0 SHA-256: 0be8bcbaca1e07fd6e7ae86b5b4b02f92d263dc3a68f31bf99cf0b996e12d5e8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. The presence of embedded URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest the document's purpose is to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://allytemp.ru/uplcv?utm_term=jeeter+boss+1+full+movie PDF link annotation
    • http://kayapalinakliyat.net/file/buzewe.pdfIn PDF document text
    • http://thriftstorewebsites.com/flash/thriftstorewebsites.com/file/xomazowilinamafajokosof.pdfIn PDF document text
    • http://www.schule.havonix.com/ckfinder/userfiles/files/41282270089.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/r7e3bmbj2dpi7qbp13u4f6ahuh/vukiwewubutefovebagug.pdfIn PDF document text
    • https://er-cardiff.com/eurostyl/photos/file/bijomapazizusiwajikumev.pdfIn PDF document text
    • https://cfbadalona.net/ckdata/files/wetesoneburajosavokonike.pdfIn PDF document text
    • https://eghamatkade.com/basefile/eghamatkadecom/files/kupekodarevovajugotobos.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16136f37fe34c9---26326585347.pdfIn PDF document text
    • https://ismart99.net/upload/files/zorobenoja.pdfIn PDF document text
    • http://soundspace.eu/Upload/file/tofigi.pdfIn PDF document text
    • http://wonderpanel.com/app/webroot/img/file/38497250005.pdfIn PDF document text
    • https://habibitours.net/ckfinder/userfiles/files/79776974774.pdfIn PDF document text
    • http://kme-kme.cz/files/file/68873802647.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/sulipe.pdfIn PDF document text
    • http://hermanosgolbano.com/admin/fckeditor/editor/filemanager/connectors/phpfile/16558346148.pdfIn PDF document text
    • http://truhlarstvisollner.cz/data/file/vipovewubo.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/161306d800f1eb---zasodiduj.pdfIn PDF document text
    • https://nocenzura.space/web/img/podborky/files/79911010419.pdfIn PDF document text
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/22851401837.pdfIn PDF document text
    • http://radis-rrl.ru/userfiles/image/78613805021.pdfIn PDF document text
    • https://zohopin.com/calisma2/files/uploads/8416312683.pdfIn PDF document text
    • http://pho32shabu.com/uploads/files/pisotevivopin.pdfIn PDF document text
    • https://copperscrap.wasteequipment.net/ckfinder/userfiles/files/64916052584.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C2 20384 bytes
SHA-256: c28d06d157e42f21e8307ab4f1b37f2ad423740f855dc2ba88f131e56e601e8b
font_02_sfnt_off000127fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127FA 10460 bytes
SHA-256: d8190ffd8e6f65d38cf4eb0c748caa9329e72b91f6927bdeba876e87be1a23d1

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