Malicious PDF — malware analysis report

Static analysis result for SHA-256 75468850264a6e75…

MALICIOUS

PDF

92.3 KB Created: 2021-09-04 02:17:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5b4772092afc5e387635e4a6a0a5a4f3 SHA-1: 922d34e4f0fa0e63b41d5c237ec0ee9e55b33c31 SHA-256: 75468850264a6e7593a9070528e0b4373d0e6d9a8e8a5a60c4487a91697954d4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is a common technique for executing malicious code. The file also exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised websites or disposable hosting. These links, combined with the JavaScript, suggest the primary goal is to redirect the user to a malicious site, likely for phishing or to download further malware. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://medvor.ru/uplcv?utm_term=guarani+mbya+pdf PDF link annotation
    • http://tygodnikzuzlowy.pl/ckfinder/userfiles/files/35046570940.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/lelavoralod.pdfIn PDF document text
    • http://membranekeyboard.pl/_data/file/netitezamuluwekezejizad.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/52794160377.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608243ece6d5b---26844454372.pdfIn PDF document text
    • https://thegioibaobicarton.com/Images_upload/files/12944106398.pdfIn PDF document text
    • https://nstyapi.com/resimler/files/25613707775.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b0bccd5b800---56057328397.pdfIn PDF document text
    • http://fpempresa.cen.es/userfiles/files/vosog.pdfIn PDF document text
    • https://mgogs.com/mgfiles/file/rusaweligatejuvegamolu.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/t8hshrn3nc3d659rhe2ttit1lp/romomadawasagigadu.pdfIn PDF document text
    • http://magyaringatlanadatbazis.hu/dev/_user/file/63274958212.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///jafanixulibozakem.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8b99d2dfc---vafuxadeweto.pdfIn PDF document text
    • http://toyotaprius-custom.com/js/upload/files/68891611620.pdfIn PDF document text
    • http://farashimirooz.com/files/lukijigozujemimonivun.pdfIn PDF document text
    • http://zae.me/datafiles/file/fuvosijojiritodu.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/linemugexokupapo.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608abecf0872a---56338523028.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160be5132175dd---65113951313.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/effa7de4048ea9740de801ef37fe963c/xorubo.pdfIn PDF document text
    • http://okna-kursk.ru/page_edit/_samples/userfiles/files/vavuxarexudozewan.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/gejinox.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF910 10488 bytes
SHA-256: 032d22ceff0ef0ed25b651f170d3aac49a1b4134c9cab6347afce436c81f7bc2
font_02_sfnt_off00011094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11094 23364 bytes
SHA-256: 2794d042bf6f9639d837ed3854c9ed8afc04e252f8387ffd582c91a6dca3af6a
font_03_sfnt_off00014c34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C34 16432 bytes
SHA-256: 838ad766e67c2fe3c275997fcc435220a77d424f6e951536c38f77b6fff586b0

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