Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9178d4f0c7a85e5…

MALICIOUS

PDF

65.1 KB Created: 2021-09-02 20:09:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 003c10bab8087298e3f50f5e3accaefb SHA-1: cece981ed5897ff244752fcdaa4f9f536195f07e SHA-256: b9178d4f0c7a85e5a506d78a2346218ce534c931944c6b255410e288d9157d18
154 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5661

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.
  • 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
  • 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 http://edallyshop.com/upload/files/93366154848.pdf In PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d58e6d2a02---48892173522.pdfIn PDF document text
    • http://lindseyderence.com/userfiles/files/nakawusuxuvax.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/67b6e27eebfd0e05fba10f60035b7399/guwidug.pdfIn PDF document text
    • http://kurier48.pl/files/userfiles/file/doxinotimosu.pdfIn PDF document text
    • https://excore.hu/ckfinder/userfiles/files/wewene.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/tudevixelig.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/f1fb74a4d7a613290a156ca7abc966d4/siwuxegixa.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16086259f7949c---zevaluxom.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/16084b5c920a59---37534658188.pdfIn PDF document text
    • http://joesservicecenternj.com/userfiles/files/94964847864.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/20ctci6fp0lt6j37nkgdal87fs/pisumaliwivesadazarozewij.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/a19ebefbc4d9a397386d683a4a7ec6f5/24948455165.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/viganaxixinuno.pdfIn PDF document text
    • http://doorsatyrau.com/ckfinder/userfiles/files/97241154181.pdfIn PDF document text
    • https://tour-paris-guide.com/cite_imgs/file/gagekamakirawulewule.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160cfb082b8d2c---33125529736.pdfIn PDF document text
    • http://coimbrasoftware.hu/images/uploads/files/20251519149.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/3179c1518f24c6ebbecfaaa0978c81b2/76047720997.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/4v8g9i2kgd65gmco7h0li5lg2m/73806555017.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/65418752645.pdfIn PDF document text
    • https://fasleh.net/Files/files/63548300167.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/18856191492.pdfIn PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lolameguw.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16071b69b2d87d---kowovog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=azoospermie+traitement+naturel+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBCA 10800 bytes
SHA-256: 85ebbdf75b08a2406c8ae428a21c0a0dac0980375f3f8d4e5721d24ef748acc4
font_01_sfnt_off0000e4b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1