Malicious PDF — malware analysis report

Static analysis result for SHA-256 bad6fd421f5e75f0…

MALICIOUS

PDF

79.7 KB Created: 2021-08-13 17:32:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4546e850b7ab343487854db001bc2446 SHA-1: 82d9fbed3da61027a89f5ea9b32cb2db5f3b9664 SHA-256: bad6fd421f5e75f0e722ba1964dbe11fb4d641f8c44d994e478f2b5dd2c3830d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a link farm with numerous URLs pointing to compromised WordPress uploads and disposable hosting. This structure is indicative of a phishing or malware distribution campaign, aiming to lure users to malicious sites. ClamAV detected this file as Pdf.Phishing.Trojan, further supporting its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8700

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://frankslawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kuzukepi.pdf In PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160946eddbc4ef---xujikerisor.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///21693618636.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d08ccea6c---27555466956.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa55b1a6bd---foginagugagasezem.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d493096299---jorebelakuxebedijewozit.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/3425be1dafee7673f95a9c67992f2aca/35554370876.pdfIn PDF document text
    • http://brette-animation.com/userfiles/file/43474450199.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160926ad6310c8---77674189086.pdfIn PDF document text
    • http://klinok-saintp.ru/files/lewepulotujosuwonesite.pdfIn PDF document text
    • http://hiddenroots.org/clients/19739/File/javubozalavijelobasuli.pdfIn PDF document text
    • http://moto-trend.cz/public/files/fck/file/xozuwitizivivokabinidi.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/b2e3fe0759304a579fea93c603df91cc/bedovulawowatuxenasanona.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c143eba5d26---nilimigarifawupaxagit.pdfIn PDF document text
    • http://isdoor.ru/uploads/files/28312308092.pdfIn PDF document text
    • http://fijiembajak.com/uploads/ck_uploads/files/99745150.pdfIn PDF document text
    • http://51www.org/uploadfile/file/14ce46f4cbc3fc2b1a8104882e783231.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/01eb4607414db7ed35c019ff21975329/fopuwubijunabig.pdfIn PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/sixutumuvobadufezefunowe.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/jokowomugatoxofexodebava.pdfIn PDF document text
    • https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/27a7a79dafb4b442619b71aef4cc1ef2/duximajogojezob.pdfIn PDF document text
    • http://architettodrabeni.it/userfiles/files/80669850609.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=complex+inheritance+patterns+worksheet+answer+keyPDF 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_off0000f1ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EA 17096 bytes
SHA-256: ab3638686973b1bb1d89cb70f5a88950ea9e493f6fef7c8c986b699052766762
font_01_sfnt_off00011e93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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