Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3041980b8c889ec…

MALICIOUS

PDF

80.5 KB Created: 2021-09-15 07:00:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2e410ab6dd8b7903d651cfbbfd146c99 SHA-1: c256c33c2c1f05c316506cfb7127e463e3b934a3 SHA-256: f3041980b8c889ecc81248cfc2c934c08f22aad624b38913803c5c50e20bee19
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to external sites, many of which are hosted on compromised WordPress installations. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade gateway scanning. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics confirm its malicious nature, classifying it as a phishing or trojan PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://archism.ru/uplcv?utm_term=bundle+version+powerdirector PDF link annotation
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1614164a40e8f0---58648149813.pdfIn PDF document text
    • https://trungtamgiasuhcmmq.com/uplaod/quangtri/files/39634875380.pdfIn PDF document text
    • http://kyea.org/imageuploads/juvotexeba.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/c9dde37f2c75ad39d9f1bd3c9f84aa90/23268963095.pdfIn PDF document text
    • https://www.ijdsir.com/ckfinder/userfiles/files/39919149979.pdfIn PDF document text
    • http://digivideos.net/ckfinder/userfiles/files/50749893291.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614161e5d52b0---tidoveduveseneginitek.pdfIn PDF document text
    • http://carbonelite.ru/file/vajapipu.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/95386914945.pdfIn PDF document text
    • http://pevak.info/UserFiles/File/4087944004.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/m8jpvop74f785i1ohk4jr9v8j3/togumepugekitokijoletikad.pdfIn PDF document text
    • http://kool-house.com/upload/editor/file/bozejoror.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/paboredo.pdfIn PDF document text
    • http://thekitchendesignstudio.org/uploads/files/xelonoz.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613faab0085f5---57964470398.pdfIn PDF document text
    • http://tecresconsolidamentorestauro.it/fck_data/file/43969535014.pdfIn PDF document text
    • http://i-p-p-c.com/ckfinder/userfiles/files/18184964081.pdfIn PDF document text
    • http://mariondhuique-mayer.com/data/file/28763512082.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/161349d1878a63---ruzipaletuda.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/bubeforufujotaguxewukinik.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_off0000d5b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B9 10648 bytes
SHA-256: fe7a283d70f87dc199b01ac7e5a083bcff06428f62b047c222f8ae6cd043af73
font_01_sfnt_off0000ee4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4B 17876 bytes
SHA-256: 1d01b690275527d77b623e34f4c9cb2d28e3b959f3e1924223ced289776de467
font_02_sfnt_off00011ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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