Malicious PDF — malware analysis report

Static analysis result for SHA-256 69d13f6cd89f68b8…

MALICIOUS

PDF

89.2 KB Created: 2021-09-03 20:15:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ce8fc946d3d7b43f62ae3d8a2767b787 SHA-1: f0d3a89b7ee121150c02a9301a6817bef8a2405c SHA-256: 69d13f6cd89f68b8bf2f30d9d48c386f12788cf34c576c34485aabd415059ebb
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://reniuved.it/file/70894974134.pdf In PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609426cf4e0ff---nufinebatelajanivovenoz.pdfIn PDF document text
    • http://tokstar.com/_UploadFile/Images/file/bumuxunug.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/56208231262.pdfIn PDF document text
    • https://bruceautoservice.com/files/file/veduzasoxiwavopitopanu.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610c937f9e23b---85775950819.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1611256559f18a---solakivosemuraja.pdfIn PDF document text
    • https://travelstore.tn/userfiles/file/welulunele.pdfIn PDF document text
    • http://servis-hradec.cz/files/file/kinoxasasidafa.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/927f20ac6d0d98d85d983c4e9e19fcd5/24619986903.pdfIn PDF document text
    • http://baovethanglongmb.com/upload/files/41954750266.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/kodutpsph8pai3d57vevllgd41/53909317079.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/c9c2329a77b1d93cb4803aff65db3c9f/fupugenowanex.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/garokonemiwenonabum.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8a8b0be320d30e049a8037a6c20050a1/sarapijaxo.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/wozugoteganevifitoluveje.pdfIn PDF document text
    • http://johnsonsdynastyincfamilyassociation.com/clients/10108/File/23947743989.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/b3844f3dba45fd1cb59f1f92080b2cfa/xolupalejo.pdfIn PDF document text
    • http://neoclassicalmansions.com/uplds/file/terasavibevaroko.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/16090481dab583---gavubiwufabasebixupawubeg.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/95218083043.pdfIn PDF document text
    • https://msiutilities.net/documents/dexutil.pdfIn PDF document text
    • https://mancomunidadvaldizarbe.com/userfiles/files/fituzagajow.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/20840759776.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/634456f258202b79c351840ac5064a32/56447530328.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=beta+talasemia+tratamiento+pdfPDF link annotation
    • 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_off0000f12e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10940 20780 bytes
SHA-256: f2cba413d07eafe11a1789aef337f82def71170d520d58f8115b4c437cd09877
font_02_sfnt_off00013e59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E59 10712 bytes
SHA-256: bdf1a0aed2b5278c07c6536e3cc00f0b097f40383872e05476b04ccefc9f4962

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