Malicious PDF — malware analysis report

Static analysis result for SHA-256 9661ba8d2507ce88…

MALICIOUS

PDF

72.5 KB Created: 2021-06-26 21:12:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6195fe0e11566016ce419687d9663e3a SHA-1: d1fba1e6d1f9529c084347ed9768d3b338d6aee5 SHA-256: 9661ba8d2507ce8854a90b26eea6a7eac050e2dbab45cab927453517c3e9b7b3
156 Risk Score

Malware Insights

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

The PDF document contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, with the heuristics identifying it as a link farm on compromised CMS uploads. No scripts were extracted, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abcbbf9c0e5---11795428737.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a61e70b2bb7---doxavunez.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/c217263657e03577d9c61590c43977e4/kejizeweloluxuzuluzu.pdf
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/fb34fa73ea930b8fe91c456eeb5ca33b/96401854219.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/8i8ama2rln8trjkbip844iiaou/zadasoseralizanidifareno.pdf
    • http://lafayetteconnections.com/clients/52818/File/55713256242.pdf
    • http://veraschwemmle.de/fckdata/file/97896021305.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/0d6687da6c74a4a2b2dbb23cd1c45dc3/64750754955.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/9mt5ftjnt8v0cfv3rkn0j7q5ad/ritaromonosepepanafu.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a562458502b---reginakur.pdf
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755c6646bf1---20719998961.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/u963uhclge0eno5tphga51no80/40822697486.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/5c9jt4d70bcc8778bh431fg6n8/68598778969.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c53fbc48559---39213316779.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b6966da51---41775701209.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609b73e414127---jarev.pdf
    • https://artbynela.com/uploads/file/vumow.pdf
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/18517747442.pdf
    • http://akkoryazilim.com/userfiles/file/98385518670.pdf
    • http://www.alcera.ca/userfiles/file/vurutefebijegema.pdf
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076078ac5884---53306994061.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160795d35f418e---peripirasuzam.pdf
    • http://toyotarent.tw/FileData/ckfinder/files/20210613_784625ED5B1D4582.pdf
    • https://villatoscana-pi.it/userfiles/file/6574154553.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=everything+about+her+full+movie+free
    • 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_off0000ba69.bin
574651559a1a610779bdae36e1042426ac4d1111c9b453cac9e1b29a353dd337		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA69 16076 bytes
font_01_sfnt_off0000e345.bin
0379d7f4ecd2d67a5e02e73c6c49b4f0773cd1232a76e7c90f20c1c025bbcf35		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE345 10896 bytes
font_02_sfnt_off0000fc4a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4A 16792 bytes

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