Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e1e2a603c3e6aee…

MALICIOUS

PDF

84.5 KB Created: 2021-06-28 12:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e590be222360fb4cd951b808cbb64a59 SHA-1: 39540eb54c59f6d1f22e5938c0d4e77a3a57dd6a SHA-256: 8e1e2a603c3e6aee213c266ac4de60bbfe16e59e1fc4e9f983c73b1a7b8cf163
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed that the PDF contains a link farm, with many URLs pointing to compromised CMS uploads or disposable hosting. These links are likely intended to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3776

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://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/80327c7b2bc27d77c528edf1d349b329/88360684105.pdf In PDF document text
    • https://luyenthitoeic.info/userfiles/file/96796674187.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/59c5d9dd281ae9d44b600472edf45657/6809057303.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/b35e69ffc75e681ac239b84609b77694/jaxowif.pdfIn PDF document text
    • http://lookkorea.net/userfiles/file/dosib.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/a054369f7ee8a636bcdc4d3b08ddaf25/zalireminulexep.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/69cead8fa6fbafcee0de0237c582072e/megiroto.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16099fdb1a7d46---70162789985.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/c187262535499dcce801e1a15f041de0/13701879728.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/013e33bdcb427623143cf825d8abc893/22993157426.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/16077959e0f771---47384427360.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/2560407254.pdfIn PDF document text
    • http://sunjewelsonline.com/userfiles/file/xomexazokuseruvebozaladob.pdfIn PDF document text
    • https://valve-toho.com/userfiles/file/99464052922.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee813b6e0e---xukodefatezunejudivox.pdfIn PDF document text
    • http://allycatering.com/userfiles/78343818553.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3109e5f20---mafagotudusewezanegi.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/4dof786ntstgtvb35fngsmic90/2559804421.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/d1dbebcae8f69f894c2508381159c91e/dugomu.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160900764480ae---pokanexog.pdfIn PDF document text
    • http://ray-king67reunion.com/clients/41562/File/17852202206.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/33b52fe30988557f6676def1ac63e620/pawulugo.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/dk0j10al3p6qtqke3dbglbqdhs/33633297332.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/3ac2c64dcd5220d258eebc3a0e35d688/22858567622.pdfIn PDF document text
    • http://zzweien.com/d/files/madibi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=pdf+the+sun+and+her+flowersPDF 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_off0000fa57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA57 22396 bytes
SHA-256: 6fa973f6e9b5718b45f96d70ad9343eed039aa76136153df134452467f95aafb
font_01_sfnt_off0001336a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1336A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1