Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae8376c8c2c0e2e9…

MALICIOUS

PDF

87.2 KB Created: 2021-07-02 00:17:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3c2499647e58bff695b158a27b8d066c SHA-1: f76e8764249175107080baa294aaa9189db1271f SHA-256: ae8376c8c2c0e2e9a36c0c0c826daac985f2d4e1946b409793a9108885ab0b2b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by a ML classifier and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories. These links likely serve to redirect users to malicious sites or download further payloads, aligning with a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608b158204bb5---guzib.pdf
    • http://xn--9w3b11kh5l.com/ckupload/files/31662675882.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/27341ac8d0135c1067640ce34ad9d7db/solosexipolesod.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b1d4658a4d0---wudulono.pdf
    • https://myphi.biz/nbloom/fckuploads/file/39735795100.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/72409c35adb26c0ee45acf2c4aad505a/beviguliligawedopewogij.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092f62bc22a8---kiraketazeviduxo.pdf
    • http://brenna-ski.pl/userfiles/file/xunavoboturatiwemuwexefiw.pdf
    • http://bfr-bialapodlaska.pl/userfiles/file/zuxizojotelomuvosas.pdf
    • http://luingpyrex.cz/foto/Image/file/peliz.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d602ac9c64---bugojopewimazebir.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074967cb4989---84021326011.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/73fbde28a72d47279944c6e46b04fed6/jotaronopude.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/4a3b7fa6d1fcac3920419b19eb227397/suxinabavom.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4b02024d7---gasetasitudoxufesewukaze.pdf
    • http://playitdirect.ca/ckfinder/uploadfiles/files/bipurawu.pdf
    • http://automotiveenergy.cz/userfiles/file/90198813486.pdf
    • https://finances-canada.com/wp-content/plugins/super-forms/uploads/php/files/7f04a7a602fe26b45b63defd4ab2710c/wupopu.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/38ccb6c0985f0b34da0a8b955f3b25e7/lunatigov.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607de6fe74de5---vajixajejanetarafitetilo.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092e10d67627---68579908029.pdf
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160800850d2d24---wujirojadawejewiva.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/j8m11b8uffhugd14ut08tahj54/82231672718.pdf
    • http://www.rotudavid.com/ckfinder/userfiles/files/rafudej.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/aeei60gdq9ohukrnja7ac71bq1/73855782953.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+make+a+boat+in+minecraft+pocket+edition
    • 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_off0000f0a5.bin
e5d251ae224a9b8fbf1ca488700099a1a8e3271b3373f08f4cceba87d83fc418		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A5 10876 bytes
font_01_sfnt_off0001098b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1098B 16792 bytes
font_02_sfnt_off0001219d.bin
75bb3e324e9d38521beecc695f201f89a969a1186108575b8cecb47b7a5324b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1219D 17472 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.