Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f909a2f19d51c98…

MALICIOUS

PDF

85.4 KB Created: 2021-06-28 02:30:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2b776b536406d7dc31796dda23fc0802 SHA-1: 911f4f3d6f44fcaa8044506efe08d3ffba61cef5 SHA-256: 0f909a2f19d51c98d575c4a2e94f845d41c0b330c9bd9a3ffedab7975c328eab
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS upload directories. The presence of numerous unknown reputation URLs suggests these are likely used for phishing or distributing further malicious content.

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://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160cb68f611ebb---6709313225.pdf
    • http://degrossier.nl/uploads/file/93651970533.pdf
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/a09c094acde78a588aff04cb66793b68/mixikawopo.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a2acb54a810---bujexodi.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/b4vgq08gs88678al4p0l59fu7g/54388220398.pdf
    • http://afghansolar.com/userfiles/file/febapawedezibuk.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/c61fa7b7eb5551902e70074ff2e2b893/wofesaxuxuratirev.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d873c706cc---83943964119.pdf
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1c4039912---kigubowuve.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/b1761ac465a61a20b5cd37952724d5c6/rejujizulujefovak.pdf
    • http://studioguagnoni.it/userfiles/files/genuwebopijinofuzavud.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc70abf8f8---96884409646.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b59caae8d2f---97670777164.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab5b0796d5---gugixop.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d8c3423dae3---lebukamikibano.pdf
    • https://deniz-sogutma.org/img/userfiles/file/jiradefonemujufo.pdf
    • http://www.aportecnica.com/imagenes/editor/file/3090389499.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16072f72e69ecb---71773690813.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8782615b76---67429387087.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/9rmbib8bofc52vubsdsj3sh6j6/takobepuxutap.pdf
    • http://vanharteyoga.nl/uploads/files/37059952458.pdf
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/iefmlae6hbmduaqg4bfitjmhrh/bozavozi.pdf
    • http://rocb-ap.org/file_media/file_image/file/jefudefebob.pdf
    • http://enjoybowlramenandpoke.com/uploads/files/bumiwasugej.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=convert+square+meters+to+acres+calculator
    • 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_off0000e8b4.bin
05abc8478e737be04a49aa65b33e9917121b175f6d66df4d3fc6295f8cb1cead		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B4 10644 bytes
font_01_sfnt_off0001012e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1012E 16792 bytes
font_02_sfnt_off00011940.bin
a543ef99651ea34e2f2b2f240d61063911f7a55047ca8ce6d02ee77944405287		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11940 17944 bytes

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