Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e2873ce2735126…

MALICIOUS

PDF

85.9 KB Created: 2021-06-26 07:41:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 59505fcdb332a9ae11664b409a66c8ac SHA-1: 38e68483d1134e31e98e3d64d37549a52f796167 SHA-256: 67e2873ce273512636e7317a47caea2434b217ee97a07711e9ab8b24d105422a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites, indicating a likely phishing or malicious redirection campaign. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to lure users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • 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://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/dd86d8e2615fffd06d21b1e2978f97ee/16029843544.pdf
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/ab5c41e373ecb76d5a6b0445cf841562/danomopoxox.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/tbpcu6e0g2b300i1dgt4o18rbb/likidakukutatenobopen.pdf
    • http://meta-min.com/files/sibimelizepo.pdf
    • http://myhomeinparis.com/userfiles/files/kitifujukegigi.pdf
    • http://sk-massimo.com/js/upload/files/54511715153.pdf
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/6f83d98fe8e39b3843fa201d8dd10ca0/monewuputibepenedetanumes.pdf
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609de928ef819---20598281304.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c285fe3681---39728305833.pdf
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/9c2dbc065d7860719e5a1313f595ac74/15783129396.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/ef678d0186dd456839df39071289e0fa/fogubebusutunu.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/4gl00bc2n95qqcurhns7alebgp/33895913660.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160835e613c124---71822700487.pdf
    • https://ises.ca/phpsites/vertical_living/uploads/file/47047238149.pdf
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/18e6087a33a44d3c868717fcec621b50/71897160648.pdf
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088c0a97009d---ratukivoz.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/zonexeviparowa.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16086106117f19---wezazimizotunikupogokebal.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb50360a79---papexe.pdf
    • https://magazinul-de-instalatii-sanitare.ro/app/webroot/files/userfiles/files/41197945214.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/1nqkv44c32b6caokatpj6dvj18/17446829284.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/su43g2ae7v7dnkq4ip4e0ig9f9/rorujoximamizizutumolipe.pdf
    • http://davidhammerstein.org/userfiles/file/venewipezizutojujadivujew.pdf
    • http://www.alexgis.com/siteuploads/editorimg/file/49898024707.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=how+to+take+high+resolution+photos
    • 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_off0000ed6a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED6A 16792 bytes
font_01_sfnt_off0001057c.bin
62b4dac2e9130b799c6d478ccec2c6d03d6aaf26a757b3cd3e50f81fdf816569		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1057C 16984 bytes
font_02_sfnt_off00013199.bin
5bbbea148fdd1245f92988a62968d8f786bd369108f34c7ad73c9a0ac8c84ed0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13199 10800 bytes

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