Malicious PDF — malware analysis report

Static analysis result for SHA-256 8878f9de3e4780a1…

MALICIOUS

PDF

215.1 KB Created: 2021-10-11 18:19:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ac877a0ef05fcefadb305877cfda794b SHA-1: 95768cd808b96a99cb0e49ace67e92c879fb7f9d SHA-256: 8878f9de3e4780a1180e9b91e8b35b8d5135ddb06ca46ea7e179d6f06301327c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs, with one specifically pointing to a compromised WordPress upload directory. The presence of multiple links suggests an attempt to direct users to potentially malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9767

Heuristics 5

  • 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.
  • 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://irlanc.ru/uplcv?utm_term=the+fosters+callie+and+jude PDF link annotation
    • http://stroi-sistema.ru/img/lojixaparifegavatov.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/bemet.pdfIn PDF document text
    • https://numen-wow.com/userfiles/cloud/files/nekiwirif.pdfIn PDF document text
    • http://jgweld18.com/UploadFile/file/20210909113729287.pdfIn PDF document text
    • https://mkontakt.pl/dat/file/25328048125.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614128452e08a---90620387258.pdfIn PDF document text
    • https://coastalstudio.com/images/main/file/lizamovujonoduxitok.pdfIn PDF document text
    • https://whitepalacegrill.com/userfiles/zuzuxepo.pdfIn PDF document text
    • https://questyme.ca/userfiles/file/47200427999.pdfIn PDF document text
    • http://sreema.org/FCKeditor/file/wodizo.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/6eadbda73c9ee3f6678658873fe61e0f/sazafororivevufiba.pdfIn PDF document text
    • https://visualmotion.nl/uploads/file/33219729830.pdfIn PDF document text
    • http://cuanhuaabshanquoc.vn/files/12106818982.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/17584670543.pdfIn PDF document text
    • http://beerskiboot.de/img/upload/file/fifaneb.pdfIn PDF document text
    • http://originalavto.ru/userfiles/file/tefogu.pdfIn PDF document text
    • http://jessie.vn/images/ckeditor/files/2884729474.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/jimerel.pdfIn PDF document text
    • http://noithatsah.com/webroot/img/files/9100835120.pdfIn PDF document text
    • http://songdolandmarkcity.com/userfiles/file/97376589533.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/5qguvkrfqiq9s2oogkpeqnco63/gedibewonelowekasijub.pdfIn PDF document text
    • http://yushendesign.com/images_fck/file/1632159395.pdfIn PDF document text
    • http://semanbio.com/upload/files/51746613613.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/21233799983.pdfIn PDF document text
    • http://air-separation-supplier.com/d/files/wusexetovakela.pdfIn PDF document text
    • http://digitalpolicycouncil.org/imagenes/file/32048506632.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_off0002e473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E473 10768 bytes
SHA-256: 97a31543f5204c7e281d09ed14f7a4464389e487b2ce4ede9e2cc37be6641979
font_01_sfnt_off0002fd21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD21 21788 bytes
SHA-256: 45a0e8cdde5abd6e466ffb81d9971be842a99a9686bba8dc2050032328e9c93b
font_02_sfnt_off00033589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33589 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1