Malicious PDF — malware analysis report

Static analysis result for SHA-256 785817964b1ea261…

MALICIOUS

PDF

100.4 KB Created: 2021-07-14 09:24:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 96de2d25b765e8b2f6d011f9ec3bfb39 SHA-1: a5fc423db35c4fe0371acd6816b2902710a09fa9 SHA-256: 785817964b1ea2619a01f757682ca0c85ed13ea693b0a899163774884994ffca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress upload directories and other disposable hosting sites, suggesting an attempt to distribute malicious content or conduct phishing. The document body is unreadable, but the heuristics indicate a malicious intent to redirect users to external, potentially harmful, URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/2dadf862cc3200b78471cef6f0099dd4/30767937061.pdf
    • https://camping-du-lac-dijon.com/fichiers/50138726541.pdf
    • http://stellar-toys.com/ckfinder/userfiles/files/90221533356.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16093b05854edb---96658654203.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/d50749dd91ff7d9674b8687fda0799cc/83807422755.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/t9ldo94fa9k88dt0dl12du15o6/wagatonozizo.pdf
    • http://yaqeen-eg.com/userfiles/file/31381319989.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607881413b37b---kiveni.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/f14bf1ab099bb18216aebc5ea03c5a4e/gubajumut.pdf
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/4aqo37kch2c3ov9i192ho5v8kg/14353993917.pdf
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608743e8799a7---50059333433.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a64933ccbc2---88849445296.pdf
    • http://wisdomtours.net/upload/file/medono.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff1d790d08---87522006525.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755f24a8a71---196195555.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609850950f972---gijizigut.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607282f3a4e72---ruxeropixogufekekij.pdf
    • http://point-grey-1970-grads.com/clients/f/fe/fe7686cf254963525dc0bd811951f15e/File/mutipadagomuk.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/6fa7419134527540993d2cd7d8327094/81307268067.pdf
    • http://charivne.info/images/file/napisagegefetibasozod.pdf
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/fd4b5a6016dd0b8a78bcbd0d7007afbc/50728569712.pdf
    • http://stattus.com/assets/file/kasuzorofuzixitejig.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/5c93fe1405d739ff675fdb382867a144/64045010882.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=tower+of+god+s1
    • 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_off000123c2.bin
6e341e8d69b106a3a6052b5a183c6bfed244f81f1afb30449e1ed845662c37cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x123C2 19404 bytes
font_01_sfnt_off0001561e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1561E 16792 bytes
font_02_sfnt_off00016e35.bin
488718427c5880d02fcea55e777914eb720862a9aff07abf34625ff2da300663
pdf-font-stream PDF embedded font (sfnt) at offset 0x16E35 10128 bytes