Malicious PDF — malware analysis report

Static analysis result for SHA-256 26da0e2131e5ebed…

MALICIOUS

PDF

90.1 KB Created: 2021-08-10 17:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b78027d27ec6e76df3f750acb27df963 SHA-1: da93fbd4503c81e957df99b92ac2edf41cfd912e SHA-256: 26da0e2131e5ebed13925ecd9ba9d215657369690908f32cf45ff0ee1cb22c2e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document's structure as a link farm suggests it's designed to lure users into clicking these links to download malicious files or visit phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://drafthe.ru/uplcv?utm_term=my+name+is+khan+download+movie+480p PDF link annotation
    • http://df-2.de/images/daten/file/4383346149.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/86992885918.pdfIn PDF document text
    • http://recviem.ru/img/upload/37188900560.pdfIn PDF document text
    • http://psychologkmalinowska.pl/ckfinder/userfiles/files/8934591632.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607267815e1a5---kororudunosotakokedebesop.pdfIn PDF document text
    • http://marathon-gexin.com/Uploadfiles/files/21843298549.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/97550162894.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853cda61aee---70061171113.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/tasasetivanogixogufozemaz.pdfIn PDF document text
    • https://ecotranslation.ca/upload/editor/file/naforepirigoxilapufibo.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/75293201919.pdfIn PDF document text
    • https://vanvoorst.info/uploaded/file/xumex.pdfIn PDF document text
    • http://www.minaakshimajumdar.com/fckimages/file/27862184517.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/56853353510.pdfIn PDF document text
    • http://thienminhgroup.com/uploads/userfiles/file/vesepexowo.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f773930dcf---zumekurexatajuse.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/16da4c7a388fd1bc0baafe309c3f0777/19509453224.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0218606a6---11618247299.pdfIn PDF document text
    • https://clearpatth.com/userfiles/file/pogomovaju.pdfIn PDF document text
    • http://classicalgardenstatues.com/uplds/file/xonetupevez.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/8695acc706098254801929b6158d2bb7/vodufasulofimolawogu.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16093a1edb3bb7---bodigaxaxe.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/vblrjh5v7p125r1t42shft9jcg/nasevuxaxusafo.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/wirogokakefurasonu.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://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_off0000fb8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8C 17496 bytes
SHA-256: 7487fec659720930645266f9de05fa4445f94048a307692689416d44900c4338
font_01_sfnt_off0001297b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1297B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14192 11216 bytes
SHA-256: 6f2bdc3d9ab117e64282bf01a6789b83d626938db89cd3e41eafb18e5be50ab1

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