Malicious PDF — malware analysis report

Static analysis result for SHA-256 03e914c78e9d5a4f…

MALICIOUS

PDF

75.3 KB Created: 2021-09-06 02:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d0065260c86275d0ac275bddc977e632 SHA-1: 8766829163b26ad9585473de77dff8d706430cb2 SHA-256: 03e914c78e9d5a4f33327e044d6c1d9d40d142e6421baa1bdb52b98d2768b7d4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://aordonez.com/images/contenidos/files/momavolukefaru.pdf In PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/h4cit0dt5soa164ecrbhfgesg5/25424432029.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/b702040d0eb672fe21c4fa52759b9fb2/87955384770.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/bexapolenalibidunigobeje.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3433ae82f9---10280648471.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/megonigamuve.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/semeludutamava.pdfIn PDF document text
    • http://brilsports.ro/userfiles/file///82968825846.pdfIn PDF document text
    • http://xn--om2b25zm6igqb.com/ckupload/files/5320311991.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085915ce1a49---18728954528.pdfIn PDF document text
    • http://liqaa-lb.com/files/userfiles/files/75338348314.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/tutojenukisuvefug.pdfIn PDF document text
    • http://peoplefoster.com/pliki/bagepufepotalopedilupi.pdfIn PDF document text
    • http://pampa.be/uploads/userfiles/files/70660825488.pdfIn PDF document text
    • https://granitnet.hu/editor_up/jesunifebulet.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606ed28479356---vozokofapuvisag.pdfIn PDF document text
    • http://e-kva.ru/admin/ckfinder/userfiles/files/rebapewerebigomixofurixi.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/segi44nbk5n3unk438ktlb4bpi/23352801553.pdfIn PDF document text
    • http://beming.com/ressource/site-image/files/tivudezupazatididaje.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/lezefofupiwa.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/a82a4fe12685cab0ee58d1cf353e50f8/78808792467.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/84178735242.pdfIn PDF document text
    • http://pmteventures.com/clients/5/57/576e8e71b788aac95a268099fab76a3d/File/peravozuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=cg+patwari+prativedan+form+pdf+downloadPDF 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_off0000bd7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD7D 10856 bytes
SHA-256: a4c8da5c9649497991cc8d5e08ba7ad59d201b61cec6086d2589e738cb6ebe89
font_01_sfnt_off0000d669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD669 18180 bytes
SHA-256: 75f5aae0620dfb46c69446cbb2d67fff29d1f5f8945b950fbb88f664fb475d56
font_02_sfnt_off0001058f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1058F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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