Malicious PDF — malware analysis report

Static analysis result for SHA-256 bce46ffc4d500e70…

MALICIOUS

PDF

80.1 KB Created: 2021-09-05 07:09:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3fecef5e8aadbda27aa2050922ef9474 SHA-1: 059c8e11589b8924d66077c9da03d37ed7545872 SHA-256: bce46ffc4d500e702c49d14232f672287ed246e5906463e29e0160f11ef40122
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of links, many pointing to compromised WordPress sites and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609459c7a5c7f---gegavuru.pdf In PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/29m2oc0u11073a7orho4eigh97/56503353943.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9ef51643f---fezovuvatazimekamege.pdfIn PDF document text
    • http://manavpublicschool.org/manav/userfiles/file/88507103008.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/vepozexufe.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1608475c84dac7---kilexesorebokavi.pdfIn PDF document text
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/32416553289.pdfIn PDF document text
    • http://aimecostruzioni.it/userfiles/files/80443772446.pdfIn PDF document text
    • http://interiorconsignments.com/media/file/korukenibi.pdfIn PDF document text
    • http://savitapiti.org/ckfinder/userfiles/files/25159419071.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982f478940d---sosopagasobenexes.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6328cdabe---49254033458.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/6885318746.pdfIn PDF document text
    • http://orsini-blasioli.it/userfiles/files/94135732526.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/b32cb300d6314fb18e3884ff3936bbf8/95083688379.pdfIn PDF document text
    • https://sonntag-immobilien.lu/userfiles/files/tufogevaluwi.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/2571367629.pdfIn PDF document text
    • https://livres-d-art.com/ckfinder/userfiles/files/70480411063.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160bbcfdf78f5f---10085100888.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16087e73588f6b---xagovudexizetegoxa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=solid+converter+pdf+9.2+full+crackPDF 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_off0000d00a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD00A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81C 18776 bytes
SHA-256: f9b51195aa8941e10227e598d491e0adff25cc4da4d7518bf7ed1b8c098c35bb
font_02_sfnt_off000118b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B9 11132 bytes
SHA-256: 1edb91e09894bc24f34e10c9fabb70121b0d74bf0692ecca1ea601897e6fb8b7

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