Malicious PDF — malware analysis report

Static analysis result for SHA-256 668f7c899071758c…

MALICIOUS

PDF

81.8 KB Created: 2021-08-10 21:41:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9feaf332f0553b69ce6bb4b06fde18f4 SHA-1: fb2ce8d8f6927fc8fceab45fa895416883e95eb3 SHA-256: 668f7c899071758c85b2fe8ba7abe5c46856731c5681c40586416892345d28f3
124 Risk Score

Malware Insights

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

The PDF file contains numerous links, many pointing to compromised WordPress upload directories, suggesting it's designed to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The presence of a 'utm_term' parameter in one of the URLs indicates a potential phishing or scam lure.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4712

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 https://pixomot.ru/uplcv?utm_term=princ%C3%ADpios+de+direito+individual+e+coletivo+do+trabalho+godinho+pdf PDF link annotation
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b370f53160a---57870648745.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16073caa5f21f6---80746072834.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608e317cab812---74864038687.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/72p61p6nqtpb3f80c0lipjtf63/zanon.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/72299968232.pdfIn PDF document text
    • http://asianmosaicnyc.com/userfiles/file/12443312302.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160800dea0d3cf---66613830958.pdfIn PDF document text
    • http://equipociclistaugeraga.com/ciclistas/userfiles/file/zitewapiwitefirifi.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0aa258786d---54557884933.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608460eeaca8d---82330034504.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160924db95153f---fimozabowowotob.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/vufom.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8d6291bf95---domosilulilo.pdfIn PDF document text
    • http://derma-dts.de/files/file/65199570393.pdfIn PDF document text
    • https://watosaphotography.com/app/webroot/userfiles/files/20210728_104459.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/766b2fe545eed7f209945b03967f0616/rorazagaraxojasowegop.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/766c8e9d64828c86079672ce5aab6ceb/senenanosabelefaxa.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b7e5df3cf---vinakuvodedub.pdfIn PDF document text
    • http://www.hussco-steel.com/husscofiles/files/95271900607.pdfIn PDF document text
    • http://scuolascifondocortinadolomiti.it/userfiles/files/22766726630.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/0886b0be98fe1e908351b2f1ac337312/69809029006.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/39752459112.pdfIn PDF document text
    • http://panteres.com/files/files/220283262.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160813bc59cbd2---vewubavopobafi.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d727f5c2f9e---puwerokikezulagevosokapu.pdfIn PDF document text
    • https://study4student.com/cache/fck_files/file/7017735560.pdfIn PDF document text
    • 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_off000101e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E5 20332 bytes
SHA-256: c84609a81a1fa5ff4cb56dbc8c7d389f39e7edcf64c2dde50082627dd84ea609
font_01_sfnt_off00013281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13281 11268 bytes
SHA-256: b249ea2a454979c80a61438f3a241159cf48d1127d0a92593aaed85a063131c3