Malicious PDF — malware analysis report

Static analysis result for SHA-256 49ed215a0811cc92…

MALICIOUS

PDF

89.3 KB Created: 2021-06-27 21:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 14fec586a910a6517a7bee88a2d4606c SHA-1: 865f5d4e5253943a515365161ca6c5506f7cc391 SHA-256: 49ed215a0811cc92a802d46f1c3598b44a1266ea25e715c6c648ae7a3c6a21d4
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links pointing to compromised WordPress installations, suggesting a link farm or redirection mechanism. The presence of these links indicates an attempt to direct users to potentially malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160b56f1d63773---6149788319.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/s3fl9ne462m90s1dgrbtb88tgt/34887944022.pdf
    • https://socohoteldanang.com/uploads/image/files/87925094621.pdf
    • https://tenfci.org/userfiles/file/waraxasesiwofu.pdf
    • http://hanasushipickup.com/uploads/files/71625973105.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3316c1f5e---pekixifev.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16077f8a986652---wolutetoxifewizasisok.pdf
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/234741d4535cc247a52f2c3849dba71d/sunenaturinisenojukidopo.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b613c39e96e---34578189467.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a64c9c92750---8370368880.pdf
    • https://aduanaldelvalle.com/userfiles/file/bewusabisudopevu.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075afe3a288a---73373758917.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b1c86a50b---2770771006.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877f5f987cd---pupesulimuli.pdf
    • http://bajcsidavidfoto.com/_user/file/ruwividijibebimu.pdf
    • http://sola-brothers.com/userfiles/file/18791941840.pdf
    • https://nanyangtextile.com/userfiles/file/negis.pdf
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/30b12406435b72b9390572737e5472ea/99343591082.pdf
    • https://himalayanthailand.com/image/upload/File/58027350370.pdf
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c50abf1d10d---manisamerulipazujubo.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/29dc8ee6bf00e0980331ffde2499caef/16909314891.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d39f1bd11b4---xavefa.pdf
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/392be06d58d709f4503633c178c6122b/65679321621.pdf
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/qd71nug0k6jkjd1bslfa3jpk3l/73884239048.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=different+essay+formats
    • 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_off0000fcee.bin
e3d70441d08a43366ca996fe6850ea1e0721bb881aeaab90c5c2314b095d5a32		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEE 10444 bytes
font_01_sfnt_off000114ad.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114AD 16792 bytes
font_02_sfnt_off00012cbf.bin
07f6dcfb592d27b6e2061131cb8e9f2d0342af39879d0e2c3064ab56a3d68a20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CBF 16620 bytes

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