Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccecb64f24867278…

MALICIOUS

PDF

83.1 KB Created: 2021-09-02 02:10:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3510730c50813ef01dc652d992ae297c SHA-1: f7088813b1015e44584d42c08beac8ac10326c82 SHA-256: ccecb64f24867278d35f5978e073db7080aebe2fcbf5e8d56f7abae028316429
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious, exhibiting characteristics of a phishing or social engineering attack. The critical heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document's intent is to trick users into revealing sensitive recovery information. Multiple URLs point to compromised CMS uploads and disposable hosting, suggesting a distribution network for malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's designed to facilitate credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://debandhelder.nl/ckfinder/userfiles/files/83278763904.pdf In PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607839aedfdbf---80510506955.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16095e7fe6158b---lewevulokuxoloxigemirokab.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a944e006a81---29467108727.pdfIn PDF document text
    • https://www.chablis-gautherin.com/ckfinder/userfiles/files/resalasatepujawumos.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/207d914a07e4b70e89fcef3c8f8ea9c9/zapavusuxukemomit.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160865ebfc2125---jazapamu.pdfIn PDF document text
    • http://www.web-globus.de/ckfinder/userfiles/files/89677599479.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/a7f488c7d4b5d07ba420cecdf151e0e1/11626736254.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/tobodikepujal.pdfIn PDF document text
    • https://standsimulator.com/ckfinder/userfiles/files/duzomijikosidasinajejub.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/senezazekiwibuxisanital.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/a11519e8596bb0cd70d26831e83ed5f9/getokiki.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/u7v8ldjlrgq43jfh8033r6tv1n/94832961004.pdfIn PDF document text
    • https://burgaseguros.com/userfiles/file/81145524540.pdfIn PDF document text
    • http://alde-pace.org/ckfinder/userfiles/files/32675750117.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/zopusabasawirepinebafeme.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/98316431807.pdfIn PDF document text
    • https://hanedantoptan.com/upload/files/82860616197.pdfIn PDF document text
    • http://fszhenjia.com/upfolder/e/files/20210624001930.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/wivuduv.pdfIn PDF document text
    • http://neurooperations.com/ckfinder/userfiles/files/93299601735.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/463f10a237910fce9b6eb123a41172c2/sekosaka.pdfIn PDF document text
    • https://cfaegaianascente.pt/portal/userfiles/files/35577419654.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=pgp+key+onlinePDF 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_off0000e02e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02E 18344 bytes
SHA-256: 1dfc919460328f1c5c1650459b632eeb2271dd2408a9b61e186aec5b3d75ddaa
font_01_sfnt_off00010f52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F52 10108 bytes
SHA-256: 5f0e6220849de1f7b67dddfb7007a97f2b0b35a5a054ecee1f1911f9140bdb21
font_02_sfnt_off000125eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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