Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8b0732e6530018d…

MALICIOUS

PDF

109.0 KB Created: 2021-06-27 23:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 19b22f59f0f7f2c2ff028e56614e9b0a SHA-1: 3bc46408eda69e176986873d21c120afb1364612 SHA-256: b8b0732e6530018d4433db2ba61fca473675528a65030d49fd989c860e7b88d9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a malicious document, potentially leveraging embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9780

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://drafthe.ru/uplcv?utm_term=he+giveth+more+grace+scripture
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160891d0bdd015---jiguxobomuv.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/mvbs4e19jisemamovnvqd242gl/nabuwefevoluderukig.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/dbede5777ffc6827c0b0692e9af8473a/34968602851.pdf
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/649704047c2c566decdd3fd75161363f/70159248178.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9adc0061c---zifuge.pdf
    • http://ekolojikweb.net/upld/userfiles/file/duzuridetet.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/c93fd80982059a9e8a45d7d5734dce7f/bifaziruxi.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/d36094b4e896d5f8751ea15c3044fe37/ravadad.pdf
    • https://topinsolventa.ro/userfiles/file/86415439435.pdf
    • https://burkina-businessschool.com/business_school/uploads/file/vifexab.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082530c0be4c---xebagimijel.pdf
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/be2a50156649afe48ac2852e273bfdb9/78381322547.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160982e244042f---61268889495.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/41e1424b928bd98c87a835cfdbcc6de5/92676956684.pdf
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/1ki1rnfhkt6kgpuuk5cpqqnknd/dusaga.pdf
    • http://studio5r.com/userfiles/files/zagezida.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/14e57981dd7b3d296a4bd16d8acc7aa5/9195367612.pdf
    • https://theatresaucinema.fr/uploads/file/fenasubepaborito.pdf
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160708e1e4e615---8871167433.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/gnjqu4q393oghq5bk1hhho08jq/58701397005.pdf
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a13f46ac38---82065014602.pdf
    • https://b2cexpressdemo.com/userfiles/file/26987462439.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/56b1cf1001fcf1736971f48d4fab4d2a/dulukuxifovoguxemuvokuv.pdf
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/c0b3ec471dc8faec576284fb9d99ad31/43841318937.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/usmn8kipeuqcaeftlakr8mcep0/5248619124.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c500b5e22---15553791130.pdf
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/c51327d1fe92f2ffc6f33e7b4babb757/zegorigojazexi.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_off000148dd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x148DD 16792 bytes
font_01_sfnt_off000160ef.bin
5a7ee87b680280dcd5526d684bb28fab662e92c79c5c4dfe40fba4ba81716ea9
pdf-font-stream PDF embedded font (sfnt) at offset 0x160EF 16624 bytes
font_02_sfnt_off00018c28.bin
70e48a9dd7fc3c50865bed3807191c19ab77bf314b4ea8606532715b5c81e1af
pdf-font-stream PDF embedded font (sfnt) at offset 0x18C28 10828 bytes