Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bd0f281140c6f26…

MALICIOUS

PDF

78.2 KB Created: 2021-09-01 08:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 46b1ecf7b3d7e47fba342f48c633f220 SHA-1: 53a15f1397f763878a56b98e2434713d586ce3e8 SHA-256: 9bd0f281140c6f2654b2a42f4f44666ee7897e971be0cb36d78954daa408c7d3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress upload storage and disposable hosting, suggesting it is part of a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports the idea that the document is a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=the+call+of+the+wild+tamil+dubbed+movie+download+isaimini PDF link annotation
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/s4i65hevehuo24eiv86tjhj1q2/fogidotuwenudolo.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609464e0815e3---26559281261.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/vivokizasejalubozuwidez.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/5fa9ad135c5ca16996715c5a52cbce74/geturer.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16098aa198e0b5---89908726031.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a08b6335218---67879128615.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1610f34ac3230f---2075191158.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160e1fe1071ed6---dutazekukijamosojukexe.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/cftr6jfi33ft8c0su8diqlgf9t/50834237903.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/73449939937.pdfIn PDF document text
    • https://fl-forever.com/upfiles/editor/files/sapolowix.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/92127922227.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/161092ca227164---nujaz.pdfIn PDF document text
    • http://www.arborvitae.cz/ckfinder/userfiles/files/fowiwotosupuwozubabikana.pdfIn PDF document text
    • http://tuderprogettazione.it/userfiles/files/dedebexosamojisavitufixes.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160fb9bf48cf19---50135717842.pdfIn PDF document text
    • http://murasakijr.com/uploads/files/bikelozevara.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/jutipezowanejozosimefew.pdfIn PDF document text
    • https://yucekalipmakina.com/tsrm1/img/userfiles/file/26446223261.pdfIn PDF document text
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/92362518397.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078732aeed2e---50347304510.pdfIn PDF document text
    • http://ttmplus.com/userfiles/files/jurejapenetavenuridu.pdfIn PDF document text
    • http://vhshf.de/File/nutorukavikojipab.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_off0000cb5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB5F 17072 bytes
SHA-256: 5ec74c6f7e1b24f6e9d417d911f6d9d4be19023ce234a1c59f1ca7ca0efb47ee
font_01_sfnt_off0000f7e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF7 10996 bytes
SHA-256: a6e223f8dab9c9aa373f691f0bbf146983d76f32d83b24f800b9fb4b3ba7076c

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