Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2383d90b7ac31c2…

MALICIOUS

PDF

81.1 KB Created: 2021-07-05 09:08:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 886f98a985a81d39872c61dd3c94a387 SHA-1: afe55ef92d21ab819b1cfd53af8f3d20ea03aff5 SHA-256: c2383d90b7ac31c2592a187a5683d6b462de9de8ad4acfd2a76a798ac94a4970
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely serve as lures for phishing attacks or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://pistant.ru/uplcv?utm_term=o+praise+the+name+of+the+lord+our+god+lyrics
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8d94089ca---83986807463.pdf
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/ig88u2jglcmlcbdnaa37tunagu/75861881217.pdf
    • http://tsradviseurs.nl/mailing/images/photo/file/juroneb.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6b0d8d401---rakizowibe.pdf
    • http://dlzj.net/upload/files/20210630120531242006.pdf
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/5qbcsgt8rq8e40kcofqkdbbgne/turaninizojafiwud.pdf
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/s21nh95q5jqgmhdrul8paqofoe/6216659763.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160a2449668905---35953614963.pdf
    • http://homeopathyhk.com/files/sarerujirumepili.pdf
    • http://imaginove.eu/data/Files/83246158045.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/84ltgebl3a8s8o34t50pfh49d4/jodegadedoxonevolafujoxi.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/ec48603c14194645a3bc5f10e25f4545/63575979726.pdf
    • http://coyada.com/up_images/up_images/witumonojopoger.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16074c16c00d88---girirezevadogakag.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160af7fcd764f5---6637020435.pdf
    • https://nanosoft.mn/images/content/File/56775378278.pdf
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a02b4f549d1---15249456169.pdf
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/7b3724b7871c29b30127177dc9bacfd1/xuvuvewuvevuv.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/eaece5d7cdfc77fcc81c2556c71f8ce0/39484629054.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b699e3f148c---40599199333.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/388c641cb1e7c5870966474cf92aef9f/60744294874.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/fq4kqmbdulrn4mc16npalostvd/pesadimukibodafaliw.pdf
    • http://bafiti.com/sklep/userfiles/file/xezuja.pdf
    • 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_off0000d50d.bin
2afc4a7c7ed1a4faa3f76e1f4ce54ea76f13827b2ac3f86fab63963e1426d00f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD50D 18512 bytes
font_01_sfnt_off00010300.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10300 16792 bytes
font_02_sfnt_off00011b17.bin
429ce692e4b45d773548235b818600603fc3ab34a427c26d6fc72e365e1ad91d
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B17 11304 bytes