Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cef69b1080f0ab4…

MALICIOUS

PDF

108.1 KB Created: 2021-07-03 08:21:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 21f4ef2ea0929f572920c5b5b867ec6b SHA-1: 7183c007a6d64c8c278348df1189395b58a66f14 SHA-256: 0cef69b1080f0ab4f6ee1b66fca437f9d87c7049b5d28c85170b41d829f5a154
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress installations and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9746

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=vandalism+meaning+in+english PDF link annotation
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160872bd90604a---82979702947.pdfIn PDF document text
    • http://ffarchitettura.it/userfiles/files/54530911805.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c0987b25022---50498496020.pdfIn PDF document text
    • http://goldway.jp/upload/board/file/26088815921.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16084e350de581---piwugubijenadilazalenap.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c407432fb---guguzotopome.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/77a7a5c8cf7349fcfc6d2c80127201fa/nelexonotix.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/04416e4e4dfea7d2b0159abd0c5c1337/48692351676.pdfIn PDF document text
    • https://propertiproperty.com/Uploads/userfiles/files/luwixubabazep.pdfIn PDF document text
    • http://blueyee.com/upload/file/280034172138.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/pikudunosilosedaloda.pdfIn PDF document text
    • https://egyiksem.hu/uploads/file/80418039000.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/rhdmebb6ioaq6v0vmgs45bbtc2/40557702383.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/8bba6c7f3dd54dc40b622778f3a447a3/volivebuwarezexerefebo.pdfIn PDF document text
    • http://samtekelektrik.com/files/bedivepugadimokapujove.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607174eb348c5---9312568466.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/7e87eaad2df1277fc0afb61957a2aace/pebavezobosodixax.pdfIn PDF document text
    • http://evpltravel.com/xv_image/file/mupajinukirutesu.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/8km8u92n606j766p8r3bhjp3f8/lebegemob.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce90b0b3fa---najozalukufi.pdfIn PDF document text
    • http://usagimatur.com/files/others/16031175126.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dad233dc53f---90041162932.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/simofowurokiwifox.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF041 6364 bytes
SHA-256: 869472bb92a7915b31b789d1d798befad477f31312db044390fe139ad1070aa2
font_01_sfnt_off0001068f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA1 27476 bytes
SHA-256: 4b69a519bb243006c0a3770472ec562a7b11cd53b64ad1f37f7c530ec921773b
font_03_sfnt_off000160fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160FA 10344 bytes
SHA-256: ed52209bd824813d46a82575fe2e75267914d02ea021f6ae44dcead96efafbb5
font_04_sfnt_off000177d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177D0 22496 bytes
SHA-256: 9621979cb31b60f97a1b665a1e406d05615987fece523c4d70bd20536446c452

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