Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a40eceead9fdb4d…

MALICIOUS

PDF

87.5 KB Created: 2021-09-12 07:51:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 33b3ba6978cc09c9c13ea292ee38c2a2 SHA-1: f2bdea09a536f5f6c701500b789232592f771a58 SHA-256: 7a40eceead9fdb4d3cca17bb73ccf21771f7f1df21072584bae4e5f2b021c6fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, indicated by numerous external URIs and link farm heuristics. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports this assessment. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://medvor.ru/uplcv?utm_term=watch+new+jack+city+full+movie+putlockers PDF link annotation
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/c897db66662ccea172499372e2da1322/1863886365.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/56271268123.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/0e89218664d35f99045b0a9002e9f0ac/sosesam.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/vevolabefofadivapowawog.pdfIn PDF document text
    • https://ptogel1.com/contents/files/puvaz.pdfIn PDF document text
    • http://radioevangilereal.com/assets/ckfinder/core/connector/php/uploads/files/ziwevegudopomosigujamugav.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613432263ca09---sunulan.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16133ee12dff99---56392418328.pdfIn PDF document text
    • http://compsult.net/userfiles/file/32308984494.pdfIn PDF document text
    • http://rotang.net/userfiles/file/61553815795.pdfIn PDF document text
    • https://sca-eagleegg5k.com/ckfinder/triplebuserfiles/file/62039780793.pdfIn PDF document text
    • https://www.winsum.frl/ckfinder/userfiles/files/wixexuroxureja.pdfIn PDF document text
    • https://esvigo.com/upload/files/fokabulibukiso.pdfIn PDF document text
    • http://jnejendomsdrift.dk/userfiles/file/53158812784.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/25879751265.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/lezime.pdfIn PDF document text
    • https://traffictkt.com/viking1/uploads/files/fajiwufogomovokir.pdfIn PDF document text
    • http://ducnhua.com/upload/files/29853215147.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/65397d1a4b83a09959f3c94eb7342ba3/nogabuxofesupova.pdfIn PDF document text
    • http://autoneza.cz/UserFiles/File/7351152510.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/vegezomoxewotufu.pdfIn PDF document text
    • https://handinhand-daycare.com/ckfinder/userfiles/files/12984262202.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/02b79b62e3eb3805c0f73029d3e724d8/bulujiposesafa.pdfIn PDF document text
    • http://plafondchauffant.fr/img/user/file/19418189272.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/3086040029.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_off0000eea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA0 11324 bytes
SHA-256: d8a77d91042a5bdb8c17edd27fc8a9f3ab5860f8020ecd6abc2d822e8051d0dd
font_01_sfnt_off00010921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10921 17992 bytes
SHA-256: 9fff2bef2a3cbef314beda310e1614f88bb796f43e2b03cc0116410b42218308
font_02_sfnt_off000137dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1