Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e513f606fb7278d…

MALICIOUS

PDF

92.9 KB Created: 2021-07-14 02:49:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 7e0f504c3a5e7bfbacf9593ee1a32d9a SHA-1: 6003dcf353ebcd5bd87a914b6043bc2e4e3952a5 SHA-256: 6e513f606fb7278dcbfe0097e8a376646e9823d9484b9aceec56eb6febe90ed7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, some of which are hosted on compromised CMS platforms, suggesting a phishing or malware distribution scheme. The presence of a 'download button' lure further supports the attack pattern of tricking users into downloading malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://medvor.ru/uplcv?utm_term=user+manual+for+iphone+7+pdf PDF link annotation
    • http://akinmedical.com/uploads/file/jewosoxuke.pdfIn PDF document text
    • https://tims.ro/ckfinder/userfiles/files/kidovopanesoza.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/8ed028635fb5a4e7f7e36818f8df6f8a/dujoxudomalopedena.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/zixoxegaresa.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/72749ba391618f01a3a9aa2b073dab6f/1908315035.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/c7176135adb9567fe661951f247ec562/88052819135.pdfIn PDF document text
    • http://vogiantinhmach.com/media/ftp/file/17900727376.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/wiliw.pdfIn PDF document text
    • http://cuacuonanbinh.com/userfiles/file/48774684439.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160e8cce06c0bf---nevarumejul.pdfIn PDF document text
    • http://myjacksonfamilyreunion.com/clients/e/e2/e2167ce47089e9b789d53270b7cccc99/File/neboguvisatokowevuliduxo.pdfIn PDF document text
    • https://farmacieitaliane.com/documenti/file/xupuponijosatigab.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/41881172506.pdfIn PDF document text
    • https://cubic.is/userfiles/file/57492756615.pdfIn PDF document text
    • https://thokhoavietnam.com/upload/files/64103909886.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/wafidebixepekejiwuto.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/45819841825.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c67ebf65006---pulajamadejifibeviwij.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/lozidikolenituzupujoboj.pdfIn PDF document text
    • https://comptables-publics.fr/userfiles/file/durero.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/okv75l0hkkr8cvggj4rtf09lul/kewoxovubafiwoligimi.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bb7bd277953---14477342906.pdfIn PDF document text
    • http://re-view.online/fckFiles/file/wabafilamozoz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011fb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB5 17544 bytes
SHA-256: e225506b81107c328efed60d51c1e76575a4c00b884a1bd9b1de9e36e2791035
font_02_sfnt_off00014dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DD4 10824 bytes
SHA-256: b1f50329b4629e62008dec9971aaf5366575d0c3eb1ee26bba6a6fe2837a50e6