Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd74929cbbe040b4…

MALICIOUS

PDF

82.4 KB Created: 2021-07-01 14:38:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 93fac66cee276622cc91c3fa94a0d5a9 SHA-1: ec4bc09b0846f508b850ca9ae0198104621e0f0b SHA-256: fd74929cbbe040b4a15ce8e212bef59b49f934fcc47a336fbaa30570f61e3cc3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9921

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://infrive.ru/uplcv?utm_term=the+end+b+of+rod+ab PDF link annotation
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5f861cdef---juzeneziposogexox.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/10f4e0088873e872e33f321fcbd79d72/88969326499.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085bf49d1462---razazuvifetusenomukik.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/tv74e9jgldgmjt7bq3e1clq4t0/risav.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/nokamusa.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/53951902249.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/53404926702.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/lupipawejividatejoxetew.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/2ab55e4b138b0c5c2b1ffe5866c23229/32546713257.pdfIn PDF document text
    • http://usateatop.com/_upload/files/61464195414.pdfIn PDF document text
    • http://sonkertrail.org/clients/9/92/9260a3c387aed4615f72c72c3a1da295/File/pigojidodakikajafusegepis.pdfIn PDF document text
    • http://slp72.com/clients/7/7b/7b902bee17765b19ebdde6030f24742d/File/61316443121.pdfIn PDF document text
    • https://aquarell.ro/userfiles/file/gekogorirajidaduvutefa.pdfIn PDF document text
    • http://dnepropress.net/files/file/15477498897.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/16083df13042ca---vemufigipetepu.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b83dd6c4526---64818860213.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/kuzozotaw.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c5c206900---40726527699.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7f501cee6---pujawuruzazirenubuzutas.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/85452278903.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/bdj8e6er2ps22b240m6rgb9o20/27397450628.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/98844639434.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/tekubugevakamujanekexovar.pdfIn PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/483700af56d7a0d9655e88c16d26e7a4/63191891828.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC895 18080 bytes
SHA-256: a7ea558191d4127e5fdf1e78d9bd23ba1a4d5b12a48ac940dbf1f6db8d272d67
font_01_sfnt_off0000f841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF841 16088 bytes
SHA-256: 450eea5fc67953cc3bdc764260aa6f1739571c17331c9588074966c3dbef4c6c
font_02_sfnt_off00010d77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D77 10152 bytes
SHA-256: 71d6a6c906fdc03be8a0c9b168ae5ac1d2ee910527905df7ec48d39b20e798da
font_03_sfnt_off00012404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12404 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.