Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3e55a47217713d4…

MALICIOUS

PDF

110.1 KB Created: 2021-06-30 21:12:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 093190c0705bf5860fb8fa1c791743d9 SHA-1: 019c68c763e2d555af9a7c5892eec209b9cc61a9 SHA-256: f3e55a47217713d4be166f676992f9fe6863c6b9a8169eee7c11706bf280e56d
156 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 phishing or trojan threat. It functions as a link farm, containing numerous external URIs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9639

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://cructi.ru/uplcv?utm_term=sexts+to+send+to+your+boyfriend PDF link annotation
    • http://travellightnepal.com/userfiles/file/95385801618.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/u957u1jubocl97pk1s6chvqpv4/41457715826.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160761e18e59d2---mifisagikepasuxewagugiji.pdfIn PDF document text
    • http://el-master.ru/userfiles/file/xemojipogupexugudukisax.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/143fe588cb0b0652e7409c90855131ed/xawuloviwadukas.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/903a59381cfa79f8b1902a4d07a54116/xazokix.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/4544127666.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/23f04c0dc5b0b0aaa01083328a739d14/xisogonazegilu.pdfIn PDF document text
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kitadefusevomi.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/ohdaggpl5uv7eqgm2mapeh8991/lukonipaxofisujub.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160885d751bb6e---jeseke.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16084610dd1bd0---tufis.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c79271c820---titabomibomaxuxet.pdfIn PDF document text
    • http://alexforstarlight.com/clients/4/41/4125d763bdae894b2c088b8c4c0f4705/File/76077429510.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070379f2b07a---jasofulesurelip.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/fn9m1gv7dueuojdbbp3fi4uu11/30580824421.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/ravotojebuf.pdfIn PDF document text
    • https://legyenegyjonapod.hu/userfiles/files/xemimukopozi.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/15690c2477afbea0315231656b6ca9bd/33431088350.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/tufujawuxibuwomowewepoj.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a05893e8ad0---34434051653.pdfIn PDF document text
    • https://askisan.com/upload/ckfinder/files/tuvuluniwomedomumutabedo.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/73278802251.pdfIn PDF document text
    • https://playerpress.com/ckfinder/userfiles/files/33393424556.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/0a8226b2868eb7e620b3c699e52641ca/17206372031.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af8b851c19b---welifadogogowopalofa.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/758e3ddc486abf3165c145ff1d7ffe51/wogiwoxes.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000132a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132A2 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467
font_01_sfnt_off00014818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14818 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001602f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1602F 10672 bytes
SHA-256: 85a40ba0c7c489119ff61d54a3a915d100950ff55636bcf62c6eda69b6535aba
font_03_sfnt_off000178c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178C8 18308 bytes
SHA-256: 46a972c4d74d791d0cc9b6979e8f5bdfedc6f6965e9fb25696878b8bddca0e94

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