Malicious PDF — malware analysis report

Static analysis result for SHA-256 779da5ac5b0ee3f4…

MALICIOUS

PDF

122.2 KB Created: 2021-07-06 14:14:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 405fb422e47010b38ab3c69d36d21c4a SHA-1: fe06ec10f233013fba8c778e7d5132b6ccbbbe61 SHA-256: 779da5ac5b0ee3f4817c437a4ecf91dde72895a4261e56fa333e8a7102aaf2a6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised CMS upload directories, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with a malicious document designed to exploit users via external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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
  • 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 https://www.erenang.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eefcd14976---kexupesejakasotakawa.pdf In PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082550f00cb9---83249680638.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/webasasas.pdfIn PDF document text
    • https://biocoils.com/img/file/97665837389.pdfIn PDF document text
    • https://proxus.nl/file/talokof.pdfIn PDF document text
    • https://hmanagement.net/userfiles/file/90233244338.pdfIn PDF document text
    • http://cloverpark1961.com/clients/6/6a/6a73a08bb68f643008adb5efbbb44e43/File/menozuda.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/9f2f36a818165be41fd1b6ebcf10232e/76144640155.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16072c75ae5861---womegodajexefu.pdfIn PDF document text
    • http://wefocusdesign.com/upload/files/63508353380.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/tuwanoruzowototovudi.pdfIn PDF document text
    • http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/65604904625.pdfIn PDF document text
    • https://digireg.lu/upload/fibawegekivekamorawaze.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/5832867812.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16089bbd14be86---77820616603.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/36199972495.pdfIn PDF document text
    • http://faurerom.com/userfiles/file/vogexefepurokoja.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/dunoxavudimatev.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/12169406284.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/eb52adb005d9e46ef56c5e82684b42d7/vowutijisoko.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a38619c195a---17238566162.pdfIn PDF document text
    • http://envigest.cz/upload/file/bobosurapegaxolufa.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/769fe6baac1b25ecd56f6d328a02ee4a/73254371903.pdfIn PDF document text
    • http://franklinbristerharveyfamily.com/clients/a/a8/a8910385c57dfddac3c6311e2bd1422e/File/powazikibi.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/3b7f14808043b428515acc70b83f4428/12608256424.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=analogous+meaning+in+tamilPDF 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_off0001797f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1797F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00019191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19191 19364 bytes
SHA-256: 5c89bd2c0acff5348f72ed313820663e9a5a1b646a36421d1d6c2b582b1a4c59
font_02_sfnt_off0001c3de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C3DE 10432 bytes
SHA-256: 3fac629f594e6f674419365baedf6dba02dfdb957d68c82e3ef5d8075ea3dbd1

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