Malicious PDF — malware analysis report

Static analysis result for SHA-256 d94ad4fcb3915068…

MALICIOUS

PDF

80.8 KB Created: 2021-06-25 23:42:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3fdbe979bfaa1e232c8feceae5151885 SHA-1: 9fc6130b2ea0736e47f4bcb06a44fcf6dbe67f09 SHA-256: d94ad4fcb39150688f71364799f83f220bfe3b4fb5d1e759bd6b85c8565c6cab
156 Risk Score

Malware Insights

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

The PDF file contains a large number of links, many of which point to compromised websites hosting other PDF files. This behavior is indicative of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature, suggesting it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baae4074e86---puzegidejobadukijiwipa.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/7d414ec4c1d56cd2c15e2cfb22486838/xamina.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160babb1f5331d---43901172812.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c0a28c9b776---59435187891.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/3eaa841858e38e0cc303fd221b59c774/ramojixutabogit.pdf
    • https://tailormade-sales-marketing.com/userfiles/file/dobozopolofunosufafuw.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608032c54898c---44737013720.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dec4626a82---23482724078.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c90f41cc3---10404252614.pdf
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/2fb135e1476c911855f846aaea2d309f/84788567842.pdf
    • http://wojno-stal.pl/pliki/file/51492027716.pdf
    • http://aliceinformaticasrl.com/user/pages/rawarezibogozazasen.pdf
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/0c5d5dc92e1d503dea57ef69c9f1aaf7/tiwosavofir.pdf
    • http://cherishedmomentphotos.com/clients/8/84/84fe84b553acfcd191e166b7401b6f02/File/bidijoweje.pdf
    • http://xlsferrosilicon.com/d/files/gawasejinuv.pdf
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/arlso4u8uao7ooqhqnrjeavs54/8659213100.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/336fb748f14bbafb7784c5b97ada6374/tafidexukadabe.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a24931f0263---54905500822.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/713vae2b9o8rj56j26f7rmc24l/73165223878.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bf430c15258---14886183012.pdf
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/slvrc07ae52fkd35t82u92r162/39252747654.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a8879ecc9f3---96637516315.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/579a48eaae16017d3101d909fd075c14/wavaso.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607239bde7e1d---72443846543.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=science+of+spice+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_off0000da55.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA55 16792 bytes
font_01_sfnt_off0000f267.bin
4acb193a66c42944acfa1ebbaf58ebe79d2d33300fa822df78320dd737b94f99
pdf-font-stream PDF embedded font (sfnt) at offset 0xF267 17104 bytes
font_02_sfnt_off00011ed7.bin
e7afc2447d1cedf9eb5e561fbae79e13134412a77707c1e9cc1e28b5964d3d52
pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED7 10284 bytes