Malicious PDF — malware analysis report

Static analysis result for SHA-256 d217c180d1151e4b…

MALICIOUS

PDF

79.4 KB Created: 2021-09-06 01:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: df5c5d537f24e8babd5f11902e2215da SHA-1: 3b28fe0946f2352999abf0d2592b208ddf5da07d SHA-256: d217c180d1151e4bc59d9aca0d9d683d95f2396b04aa9ebb0c284ac3de451f3c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a malicious link farm designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://inwebjor.ru/uplcv?utm_term=pay+or+quit+notice+california+pdf PDF link annotation
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/72b569c758535394717cc895a3301f57/xuvibasu.pdfIn PDF document text
    • http://ambulatorioveterinarioilprato.eu/userfiles/files/nugitafozipaluwukiwexet.pdfIn PDF document text
    • http://kfbi.ru/content/file/goseraxo.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/12879d1ed89a0769997e007ec16c0368/rujas.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/732866967.pdfIn PDF document text
    • http://aburobocon2019.mnb.mn/uploads/files/63022742443.pdfIn PDF document text
    • https://mnlex.it/file/61849830755.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/ea2c1fa042b04f76ad0bc0b05967a5cb/wifotu.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/ae2328d00e3577fc1e9cf3377b950fba/mivepobalitizufizali.pdfIn PDF document text
    • https://jotelek.hu/files/file/65659126882.pdfIn PDF document text
    • http://vestmorecapital.com/images/epost/ziwuxozolidewowotagibale.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c384311c42d---fidadimowoxi.pdfIn PDF document text
    • http://morebricks.com/ckfinder/userfiles/files/85990033277.pdfIn PDF document text
    • https://dimensionshoppe.com/alpha/ckfinder/userfiles/files/tisurawuvubufazek.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/35e05f9107c2f54475ddbcbd1f7dad14/vininabitibumod.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d031645e71---19574242785.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd9f6ae296---bavapo.pdfIn PDF document text
    • http://oilmachineydy.com/d/files/bebarinirutomiteferarak.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/59066415613.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/afce92756e11b4dbb6ebb79a3aed0d14/747867837.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/98f8c0e76a0e924d02f63b8e140003fd/19053703001.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16099d55e64263---lutojaxuzo.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_off0000d4a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A9 10808 bytes
SHA-256: 9ab7270d59ae835b757b83b458c7e813ac734d24523160bcfa954ecad852dc92
font_01_sfnt_off0000ed84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10596 16328 bytes
SHA-256: 7be5afb017ffe09b5b69c32f983abd12f14f1d9b04e5cab8798f3c5f515329de

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