Malicious PDF — malware analysis report

Static analysis result for SHA-256 abbb93e11965ffcb…

MALICIOUS

PDF

86.6 KB Created: 2021-09-04 20:34:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c2f8be9e5e41fc7ca50140c6f881a941 SHA-1: 2af91c1404d949d94e07dea9a51116f95e061dd0 SHA-256: abbb93e11965ffcb4c81dd433984c7cd05a98d8afcffbae98927382b19f535ce
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or other potentially untrusted domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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
  • 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://faresaldabbous.com/uploads/files/72344517549.pdf In PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160fce147d2421---691627601.pdfIn PDF document text
    • http://manavpublicschool.org/manav/userfiles/file/84972645839.pdfIn PDF document text
    • https://netcsemege.hu/ckfinder/userfiles/files/39279873985.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/fc1359e22ab3ab95d43cc9c668ab752c/jilamoxegujopuxi.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/2e7357f01b6ec42c84147ff6639d66dd/46322107398.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/96aefcbe835857e73561f5bfd4c7d57c/garezaxogogidofowez.pdfIn PDF document text
    • https://aashianarealty.com/file/37255353393.pdfIn PDF document text
    • http://chinajnbt.com/images/upload/File/84785163717.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608589efb48cd---rugiviwufomo.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/33922822853.pdfIn PDF document text
    • http://j-club.eu/userfiles/file/netenoxuzemop.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/8114155081.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9d66b8d3f9---13813022090.pdfIn PDF document text
    • https://yodobashi-church.com/39927721350.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160837bc8591bd---lofenipetizapik.pdfIn PDF document text
    • https://vgi-vn.vn/app/webroot/img/files/10377890754.pdfIn PDF document text
    • http://myapartment.de/web/editor/files/92395142045.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/57802459983.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/d08ed8ce75773e5c7dd05b97b6650802/26803337595.pdfIn PDF document text
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607efd5adf749---66382283992.pdfIn PDF document text
    • http://parilka.by/var/upload/file/17520485964.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/kefureterugeronenizime.pdfIn PDF document text
    • http://dzbnf.com/upload/file///15836717656.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16089fd7c542f0---zenaguwijovifu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=whirlpool+microwave+and+oven+combo+manualPDF 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_off0000ed20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED20 10896 bytes
SHA-256: 6f960c9b76d0e33dcf2772ec838971c68527f71ea6a8e670a56372cb8cbb306e
font_01_sfnt_off000105e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E0 17984 bytes
SHA-256: f73c0a2934e2b26747c4b4c64ee9ef8de7586123b73ea5caf54942fef0cd3eeb
font_02_sfnt_off00013468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13468 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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