Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e847388951e445…

MALICIOUS

PDF

88.5 KB Created: 2021-07-03 07:23:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: fe7238658ed1d4fab59c7882ecdef3c9 SHA-1: f329ddd89a076eecde2a3edd365ecab75d2f4ffa SHA-256: 67e847388951e445308b02cdc74d3a0af1b947b37610f64882cbc7b5872d4fe9
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to distribute malicious content or phish users. The presence of numerous external URIs and link farms indicates a likely intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/grf05ak4tvqqjch4evgf9k3c16/zebepafizazefudidapegisa.pdf In PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/35c0b70b9074451018c1afdc692404f4/gofimutifavejed.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/17949670614.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/ff8a4687e154d8ebbaeba5584c3d0e84/62147818435.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/1ba7e1b7fbb832a3698e2eb28a3f4270/kewufefazapakowixer.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/92688405576.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/ac32e604c802dc839539d20e6e13ef07/36844316629.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/esj8c2kqh41n59bumsngs190n1/5096684293.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16098966f9c072---fomevavujenutuf.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/1076fdd7f0f1b427aa0337d5ebd46c1e/nekanamosizodevamubiwuje.pdfIn PDF document text
    • https://primer-spb.ru/files/files/resov.pdfIn PDF document text
    • http://smflow.in/admin/uploads/file/78403435883.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2c909b87d---44077756088.pdfIn PDF document text
    • http://caphegiabao.com/upload/fck/file/kozozuro.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/larow.pdfIn PDF document text
    • http://amblesidewindermere.ca/fckuploads/images/file/loravu.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/f8f5f18756f7ab10a40b75243bedd6fe/gixop.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/59563805600.pdfIn PDF document text
    • http://hasici-pristroje-eshop.cz/files/file/bisuvutidudunovelulenuken.pdfIn PDF document text
    • http://kimbuunguyen.com/uploads/userfiles/file/32706435145.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/a7ddd8f79879b08cacf6c5da8cfe335b/85815800297.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/13652768160cb0c6204e42.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c210a0e68e3---14721365343.pdfIn PDF document text
    • https://aparcaderoshaddaichile.cl/uploads/images/files/92533766637.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=in+vivo+toxicityPDF 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_off0000fab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB2 9848 bytes
SHA-256: 8af227dadad0d72daf566d6e0f3810663670e867bcf413672cfd672ef9a2d7cc
font_01_sfnt_off0001107b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1107B 16856 bytes
SHA-256: bda403a115a5c85a2ee08c03699d3e9ab723de9b0449be70450d7a2f0783ca4d
font_02_sfnt_off00013c96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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