Malicious PDF — malware analysis report

Static analysis result for SHA-256 18f7ed771fb32427…

MALICIOUS

PDF

70.2 KB Created: 2021-09-05 01:58:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 954206574134ea08a02103492fc63fda SHA-1: c0689553610ef834b8311aec0a3e66720c09856c SHA-256: 18f7ed771fb32427a1632318dfa87851a65c6bad4b60e6a9e7398e2c0991bc72
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress sites. The ClamAV detection indicates this is a phishing trojan. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are designed to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3555

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/af1b8f8d19cd35f5aae7cebe1e43e1e0/jakavewakekoginakepatag.pdf In PDF document text
    • http://everbeenmagnet.com/js/upfiles/files/29054948860.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3f9e345f1---47032350789.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/t2us9n2qlrq0vmmiqhpq9it3ja/ninadevajogizawovan.pdfIn PDF document text
    • https://markyatirim.com/resimler/files/kemagewalevog.pdfIn PDF document text
    • http://lyjclinic.com/ckupload/files/rozidujexiluxatoj.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dfbd4ff3cef---8053031204.pdfIn PDF document text
    • http://tdbakademi.org/userfiles/files/zifufizosikobagili.pdfIn PDF document text
    • https://zoldlepes.hu/userfiles/file/94482627072.pdfIn PDF document text
    • http://apcmagon.com/userfiles/20904009823.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/e5ed6e4cada214ca2457018fe5a6925a/rigezorab.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608946fcd18e9---38264661443.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/zerob.pdfIn PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/kujakifajeloj.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/fsmkkq6t7b08se3t98bev645dj/85852516981.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160778355ae8a1---94657161486.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/xopakarojivefotamiw.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/71f7338ee26a2d228eff74c93426165d/fapaxusogif.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/1t2u8slqgiq8shbsg017g0qset/38189372893.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/fikogan.pdfIn PDF document text
    • http://zjgjqmr.com/v15/Upload/file/20217301350238530.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612d0dfff17a3---61371470616.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160949b7344628---19863583999.pdfIn PDF document text
    • https://kermiradiatoriai.lt/images/files/zeboburukotagimetu.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7bf6bc67f---77109317563.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/pugoforoxo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=capacitor+and+inductor+example+problems+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_off0000cdb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDB3 11156 bytes
SHA-256: 027b9bfc9292d29137f49560758d5a9567d44d638da280c2c1671905f1f9bb33
font_01_sfnt_off0000e794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE794 16708 bytes
SHA-256: e66f6e8f2715eb260358d3f28ff50d89ccdd9fe5c24915893cb38bf2677c6e6a