Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb3033970e034ca9…

MALICIOUS

PDF

94.6 KB Created: 2021-06-28 17:42:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 35c9f18b09934f92ffb6680a6c290971 SHA-1: bdd8d57555553e86dc6392975511299ea2b76e36 SHA-256: bb3033970e034ca9acad6db49c14550b9106ea189b79180a6daafd2f05882fe7
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. Heuristics indicate the document functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and potentially disposable hosting. These links are likely intended to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/5ba9add724e1d46f803bdaf4c694ba9c/97117772579.pdf
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/5j40lfidnqeflsm71at0fctcl4/98412803866.pdf
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aa49956db3a---bidorexubedenotisuw.pdf
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0fdc7f363---gojirexoxevenapasubewow.pdf
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16077fe6f9aa41---16137493719.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160929e1c22fed---togujejubuwagi.pdf
    • http://immodraft.nrw/images/architekten_agentur_images_/file/noragarezinobupetikesifot.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160842ff78c31a---26335054548.pdf
    • http://humanitool.ru/userfiles/file/13381272816.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160717e72a6fa9---72950737698.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2a9d1e486---someb.pdf
    • http://atek-ent.com/upload/file/rugapexav.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/5337e31fabf0560e21dc6937135fcdbf/86358004238.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/37430514ea5e760e98f08592694448c2/29945376265.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160781ce436e7a---34478645894.pdf
    • http://amphorabeautyclub.com/campannas/file/50346724764.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9bde7e56a7---81987179113.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/5gssjjih3b0pbh5fgo4jdan0ca/1758443326.pdf
    • http://dongkoo.com/uploads/editor/files/4899101148.pdf
    • http://forglass.sk/userfiles/file/zigakodoritozefogijedan.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608331b5aca41---21049302359.pdf
    • http://rgjbreunion.com/clients/6/69/6950e03db8b1ea894755b369f0a03c31/File/botenaritu.pdf
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609b3bf844a8e---judogutobeli.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b670049da48---kaxejutuxatikawiki.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/2f7b8ef7456af1905654c53769a43a88/nugiselaletogodugu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=spyic+cracked+version
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edb5.bin
c2c2074e912bc9b06e4bd3ac93d84d17b7762153a61c2b5a2f281b93d09389be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB5 19892 bytes
font_01_sfnt_off00012098.bin
24f4e9da4803f84bc02906022bb0f7359ed44ff56e6c61ec536a1e548e7e7af9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12098 10712 bytes
font_02_sfnt_off0001394d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1394D 16792 bytes
font_03_sfnt_off0001515e.bin
3ef3189de7b0b96af064bb607b15a90353ce495f370dd5692b3a4b816a03dae6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1515E 17412 bytes

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