Malicious PDF — malware analysis report

Static analysis result for SHA-256 e67126f582fe806f…

MALICIOUS

PDF

79.1 KB Created: 2021-09-01 19:19:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 97d61fd48892aac073b4d17871b50f53 SHA-1: 6a620dadafa2c52f408cca11f076d2d582f9297c SHA-256: e67126f582fe806f2a9dc76fd8ffd96b534d3b3f919e91e75e5b4e345f354828
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://kriosispl.com/cote_dor_import/admin/ckfinder/userfiles/files/35469298516.pdf In PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16081f00559e46---fidivuluvewigi.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/kusewavabikev.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2a0abdd19f---jebolozesibizudopavugaju.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/a3bfb60b3f42b4ba6c4b5eb4f1a6240c/32022188133.pdfIn PDF document text
    • https://taiwancy.com/app/webroot/userfiles/files/57893829660.pdfIn PDF document text
    • https://www.liftechforklifts.com.au/application/third_party/ckfinder/userfiles/files/newodipag.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/ub056f6qnat252gtartk8gm6b3/riduxagasolevuj.pdfIn PDF document text
    • http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/94566428653.pdfIn PDF document text
    • http://verynailscm.com/user_img/file/40452667987.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/fivisadeziv.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a1f79bfe000cc0c6fb5ce7aaccb683ad/39742402457.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/53629288514.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ade0f5305b5---fobegonogewaji.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/a0d4028a276f95c1626aa4d0993d6d29/jiganipigovizuluri.pdfIn PDF document text
    • http://yakutiaprime.ru/SITE/files/editor/file/busazetuzixuvev.pdfIn PDF document text
    • https://jdlpartnerss.com/userfiles/file/32160329980.pdfIn PDF document text
    • https://pnp-studio.com/fckeditorfiles/file/18334062222.pdfIn PDF document text
    • http://www.cavice.fi/tiedostot/files/68689775199.pdfIn PDF document text
    • http://beautifulmoda.com/userfiles/files/zijivuli.pdfIn PDF document text
    • http://dgjst.com/upfile/file/gidovoju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=don+guide+for+12th+tamil+pdfPDF 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_off0000c5d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5D5 21576 bytes
SHA-256: bbd9312abc11edb386c24e3c7f729c491c4c4700d2c91a9497571638015b1f27
font_01_sfnt_off0000fc6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11486 11052 bytes
SHA-256: 41fd7fec3f32f2047fb5e29bfbed02a8def4cabd19e61d1169534480ec715773

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