Malicious PDF — malware analysis report

Static analysis result for SHA-256 67de9df0369096ab…

MALICIOUS

PDF

71.0 KB Created: 2021-09-24 22:34:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9fd105677d989ef7835e0301f5f95c53 SHA-1: d03300252de920851511a5affd5b5cd0ee9a4fbb SHA-256: 67de9df0369096ab12f5b490c740585a7b5fc0bd991218d28cbfffd19efbecd8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised WordPress sites or disposable hosting, indicating a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as phishing. While no scripts were directly extracted, the nature of the link farm and the PDF structure suggest it's intended to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://uzmanwebci.com/calisma2/files/uploads/suketewapivagak.pdf
    • http://duocthientam.com/uploads/ckfinder/files/64629212314.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161364b442e59f---vozobizegonurexisu.pdf
    • http://frezerovka.by/images/fxeditor/file/dujuwaxipanawenoviwonuxos.pdf
    • http://magic-mugs-factory.com/uploadfile/files/67397916941.pdf
    • https://globalmediaminds.com/uploads/files/welaf.pdf
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16148921f647ab---29775739633.pdf
    • http://cataga.de/beta/files/file/tabovod.pdf
    • http://slovoveri.org/userfiles/95443531997.pdf
    • https://www.leasing.net.in/ckfinder/userfiles/files/jozetabotomelifexupuxiwi.pdf
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/pugaxo.pdf
    • http://actinq.nl/upload/file/janele.pdf
    • https://equimat-cheval.fr/file/judubinigojefadubo.pdf
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/c72535b238b0568525cfcd86cc6e28cc/mijuranibiwivifap.pdf
    • http://archi1919.com/smlclub-files/file/57007828787.pdf
    • http://solo-reisen.com/media/images/file/64497527775.pdf
    • https://ph2020.org/FCKeditor/file/tazalovojalof.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/49107f386bd8b30f105b15854ec45d43/xazatafamerofuvakov.pdf
    • http://tmkb.org.tr/ckfinder/userfiles/files/gigutorinedazusuvubakaf.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16141a81b35ea4---vobivilakadaridifima.pdf
    • http://akinmedical.com/uploads/file/14409716552.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16139eb17594b1---bavupibabirunugutonarebar.pdf
    • http://milkexim.ru/imgeditor/file/podiveninedejagaselog.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc0c9b6ce0---18024956002.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=the+sims+mobile+glitch
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b423.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB423 16792 bytes
font_01_sfnt_off0000cc35.bin
e61b81c87734bdf5db97e1230d1e7f25edd31579ea86836fb3a05e73ebb1fb87
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC35 16500 bytes
font_02_sfnt_off0000f6c3.bin
6e1cb518bd92b5a173841f4a54629cf944b5ec7c7c39a01e1644deb6a4f082e9
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C3 10416 bytes