Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d7c97eb1ba9d203…

MALICIOUS

PDF

99.6 KB Created: 2021-07-20 12:24:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a5cc7f8cf5684f1679a8fafb675e0741 SHA-1: b331b24428ad6da1cb4fcbbf442f8783b0b750f1 SHA-256: 0d7c97eb1ba9d203149972cf2d02803ac9ba0b2accb5ec6da0c0f37a1841fac2
156 Risk Score

Malware Insights

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

The PDF document contains a large number of links, many pointing to domains associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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 http://dobrasekacka.cz/userfiles/file/10914422788.pdf In PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/7cdd5167fc340154ba42bd9e279837c6/jevefixox.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ab97f0f1fce---wozubiwusapatok.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/97754493040.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/mixam.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160851599b7130---84867380293.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/71257732602.pdfIn PDF document text
    • http://www.toeterloeh44.de/files/92982149391.pdfIn PDF document text
    • https://megalightgroup.lv/uploads/files/8926917910.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/3d106b9f6cca95d8d3d39d9620465632/72307496957.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/cd5109e4b431b22346348bc8184ec520/gatusewozusowibenufe.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/p8fvvpnrh298ip7qbhjv8m9m09/gisufulekawutewolivenojil.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160781a039c874---35074039315.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bc6768491e4---sumam.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/f62b59d1e95318d40b9aeae99d342fb3/nikigawukaxiwoloda.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160913966d68c3---kegudagawuvo.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c780f95c56---nupexowekekuvirejonufuv.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160714d49d9d9f---jivalelugopex.pdfIn PDF document text
    • http://wallsfamilyreunion.com/clients/876683/File/papetedinudivaku.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f37f08b71---61984430845.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/p30h1a09er6mlt04m1b42rvq1l/89947338509.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bcdfed28c16---62343536234.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/aae9074442cddbeefb6579367aa2bc4a/luruwu.pdfIn PDF document text
    • https://champion-osk.pl/userfiles/file/54311218285.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d666ff9defe---sufumumazogafikejadodus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=managerial+economics+and+operations+researchPDF link annotation
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000120a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000138bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138BB 10956 bytes
SHA-256: f755288963a2624a191b8f499a45480674c54efda05955b5275d9addcac1dc45
font_02_sfnt_off000151b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151B2 18296 bytes
SHA-256: cabf7ca6d38fbd1f0eb3708c7a43537e51887e5bf1f244671d7e9c09a0174c74