Malicious PDF — malware analysis report

Static analysis result for SHA-256 58add1ef4ff9c20e…

MALICIOUS

PDF

79.6 KB Created: 2021-07-01 12:11:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9258382837b5e19e7d13d8f31aed295a SHA-1: 797db64c89895fa82ffb2d78de2cc7dae9ac5c73 SHA-256: 58add1ef4ff9c20e9b3c5d6b602c6693c706c2ab9ed3fc34989a1710deb2b2a8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is often used to execute malicious actions within PDFs. Additionally, numerous URLs were extracted, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/5c3cbdef6df2f42a8ebaf27765c867d9/mejegamaniwepo.pdf
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d62195bfa07---takazolovuluvevotukev.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a2fe2b93f08---89809994099.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076ae95cd9cf---60254322602.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160dd7cda0edd7---13511410374.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8e711279a---fexowekiduxi.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac441917503---lezusurekixibelad.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2cde7153ab---devetijolalejaj.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/kbnkjugdnrsfl5vsftvbum0jom/tatotuxinofuv.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609263678a95d---maxoruxufifidagewikoxu.pdf
    • http://garageanything.com/js/upload/files/22177570964.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a59013e8957---87661352954.pdf
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sazezodaxovofikugi.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b794c8f2e8c---88777574839.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/ab75c15ce083e0c26d1f9e4e340e2c73/6445767412.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/4k87nrm8f0iuohfluotrdcjhp1/57323507586.pdf
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/32a888c40ca018ca7ff6eec5c4fb9820/67918410777.pdf
    • http://wojno-stal.pl/pliki/file/lefavoseropiduf.pdf
    • http://hanasushichoice.com/uploads/files/56497472721.pdf
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/b74307ac378ad4a9a586bc1c3b9c5a83/tesubabomogujedepome.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c65d8c895---8107491497.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/g5utqlq7ffj79vtq1u396u7874/2210155651.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/f14abfcaaef6fadf8280d761a5dc7a25/53980669201.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac03d69a78a---2046796205.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=words+from+steeld
    • 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_off0000d3ee.bin
3bb8f7c67029732ef7c9a5588623e92c8872b91add21905ebf3148a36bb76da5
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3EE 18168 bytes
font_01_sfnt_off000102a0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x102A0 16792 bytes
font_02_sfnt_off00011ab7.bin
d9b7c1daa3f9b0b8b484043387ecea8934df72d8d8d13995fb88502b931affed
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB7 10152 bytes