Malicious PDF — malware analysis report

Static analysis result for SHA-256 6324dc45ffdd190a…

MALICIOUS

PDF

260.9 KB Created: 2021-08-23 15:35:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: fcee7e8c0f6e90a11310cfe987978d52 SHA-1: a71001d89601de6221b591cc8acbb4aa72ed4c59 SHA-256: 6324dc45ffdd190a27ceb07c9ea9095fb6ec57dc980cd52dfe78ac2da981708e
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. The presence of a 'Password-protected archive handoff' heuristic suggests the document is designed to trick users into downloading an encrypted payload, likely by providing password instructions. Numerous external URLs are embedded, some pointing to compromised WordPress sites, further supporting a malicious intent to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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=php+coding+standards+pdf PDF link annotation
    • https://accuratesearch.com/userfiles/file/42023226540.pdfIn PDF document text
    • https://picinterior.com/ckfinder/userfiles/files/jibekerotijib.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/lomirew.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/59094455217.pdfIn PDF document text
    • https://peptidturkiye.com/ckfinder/userfiles/files/tikovasebumiw.pdfIn PDF document text
    • https://avenue102.com/uploads/file/45096915142.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/at085ru57tjnj9vpdv9dq2ro7d/vimibasanesagilosupulom.pdfIn PDF document text
    • https://shivajigrihnirman.com/singhania/downloads/file/57844006487.pdfIn PDF document text
    • http://lutechmed.com/Images_upload/files/tomunobulipexigopode.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6fbb9aea9---gevimunabomulex.pdfIn PDF document text
    • http://mastervgtour.by/var/upload/file/polenizixixadatoteva.pdfIn PDF document text
    • http://sunwisechem.com/Uploadfiles/files/wanijifomatemewesom.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d539f51866099d3a44049301ecb3256d/bosovesamareloganar.pdfIn PDF document text
    • https://tennis94.fr/img/pics/files/juwakofapunejumopi.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160820642712c5---5119681855.pdfIn PDF document text
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/33205269202.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/5dcb46df7d799aa89767fcf86569a39e/pakenutoluboxejidab.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/31445171501.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb75c72bc52---53611462929.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/vivevinomumebalixepa.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/4c1b28864d285984b7dd182984404897/ninakuxivosojusot.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/b0932158527a45abf69a4ebd082a51e6/daxumirakujowaginezipa.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_off0003a204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3A204 19000 bytes
SHA-256: 451de9ad88c86120a86920d1e9473a04bb384298a32bbc0b33b1382dace8bd5c
font_01_sfnt_off0003d4c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3D4C8 10724 bytes
SHA-256: 9e0271e4f0dc1bcf17fbe9ea2f08786fff1007e569d8d1169e6eb2e48e8a201e
font_02_sfnt_off0003ed23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3ED23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1