Malicious PDF — malware analysis report

Static analysis result for SHA-256 10f9d04379b8ad6b…

MALICIOUS

PDF

79.6 KB Created: 2021-07-10 04:38:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 629dbcab506b6d3c1f468b2588c67e5b SHA-1: 5a6f0397e0db79f35dfceb090eb196e24d7c2d58 SHA-256: 10f9d04379b8ad6b1cca223ea15049461536f57c50691ed4367f0da29533f6d5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. While no scripts were explicitly extracted, the structure and URL patterns suggest an attempt to lure users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4020

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://laborke.ru/uplcv?utm_term=class+6+science+chapter+13+extra+questions+and+answers PDF link annotation
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/8guvsng6odb8421jmoc3s3pl9f/80407736900.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/firazeradasa.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/jidagavufewowane.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/amejodif.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/hfnda32e3mbdbiq7n8e5rpssd8/lewajugametofolu.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/81991351761.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/8c0m5nl3eb9sbne8nagi3j8s42/5808065772.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/panoratavemetiwidoponoxoz.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/537ad3dfcace2e07463f8709298d4e42/zotojivawewasitodaveta.pdfIn PDF document text
    • https://shindah.com/images/ckeditor_img/files/depizabeniruxoxurajomi.pdfIn PDF document text
    • https://micro-churches.net/uploads/file/14707036575.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b148d74739b---73170200634.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/3fc1effddbccae8f37f587ee887dde78/76281081699.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/af20d8ee344378195dedbdc3be219896/12086549741.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160796084b741e---24172048886.pdfIn PDF document text
    • https://dehaventransportation.com/home/de/public_html/ckfinder/userfiles/files/59715044821.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/e04f9fa8125c2673266678f137d144fb/44604105598.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c78353953aa---dubesepatedokig.pdfIn PDF document text
    • http://cameradungphat.com/uploads/files/kavogobabowosuzisezowozab.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/rerejaterexomamuponugegek.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/tajofadigudalupevorud.pdfIn 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_off0000dc61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF473 16564 bytes
SHA-256: 6bfd3b3262af173a697471a7f24b969300bee83bacd945ab9c892c689e61946e
font_02_sfnt_off00011f89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F89 11468 bytes
SHA-256: b66ddba3daf0b370e699568ea640c3b1daf3267cfe8d829341994640d2b3a1ff