Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d02e210b3a5fb7e…

MALICIOUS

PDF

76.8 KB Created: 2021-09-03 08:36:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9cc27c42bf2aac96dbb41182a6a0eb36 SHA-1: 7b212a90a3cf712a76108d0a8f01c17793cf8911 SHA-256: 9d02e210b3a5fb7edc570b6cbd9662e2bf233ef30534ed2d13fd0c6a84b94c8d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing lures disguised as document converters. No scripts were extracted, but the PDF structure and embedded URLs point towards a phishing or malicious content delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://philabc.ru/uplcv?utm_term=adobe+converter+pdf+to+word+free+online PDF link annotation
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/motuzezikegiw.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/92989760795.pdfIn PDF document text
    • https://jakspravnenapsa.cz/userfiles/file/rerizil.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16090c3ca0d69d---zokizerusuzovi.pdfIn PDF document text
    • https://paymentor.nl/uploads//file/gisosibonupixado.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983fbd7e9a9---35196404869.pdfIn PDF document text
    • https://geneolock.com/ckfinder/userfiles/files/salodunedimi.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/a56cebbf4e6a80604076465289f5f286/6078009387.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16089378fb85ca---26334410470.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/444d049768aa842373e3577ddc54fa16/71654222619.pdfIn PDF document text
    • https://cartolmania.it/file/jepagupa.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160fa182eae1c6---muzenopa.pdfIn PDF document text
    • https://dzido.pl/userfiles/file/56598266167.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/midiboxa.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607e46ff4e2d9---dujena.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/871a56f177fb041dbbc18cb479b15bec/39276520871.pdfIn PDF document text
    • http://saltokisport.com/uploads/files/49369826506.pdfIn PDF document text
    • http://italiancousins.net/clients/5/54/54f3d33123424807706abe9154268524/File/5345395793.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/nidibonuralupi.pdfIn PDF document text
    • http://christmaslandint.com/userfiles/lubitinimuvasosur.pdfIn PDF document text
    • http://cz-synergy.cz/data/file/bijufabimotem.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/b72483b441a3230ebe7fcf1a2ab81f28/95909667772.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c95d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC95D 17080 bytes
SHA-256: 96ed9699332a39bd074d58f38bf6d01c5ac94687327c3f14a63e287735457bc0
font_01_sfnt_off0000f5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBB 10556 bytes
SHA-256: 9a1121120143ac7e0dc22d8bace8a79cddb6194150638358b7f0adaf27787a24

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