Malicious PDF — malware analysis report

Static analysis result for SHA-256 12c8bfa2b219e3ac…

MALICIOUS

PDF

64.0 KB Created: 2021-09-03 04:35:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 195f012e7a9d3279a2fe69de2fe54ded SHA-1: 65c49123a5ff513839508148b2632b58220dad26 SHA-256: 12c8bfa2b219e3ace233422d65db9adf48a9ff8bf9a2dcbb84b2f254d1ac4369
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress sites, suggesting it is used to distribute malicious content or redirect users to phishing pages. The presence of link farms on disposable hosting further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5809

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://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607097ec1b6db---91652614383.pdf In PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/56d04d27ed7b061656860b447fc2d2f1/lekotefebovowefuwe.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f872beafaaa---vujenejazaposokidem.pdfIn PDF document text
    • https://marikakozmetika.hu/editor_up/kavavamurebunezafeleneni.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/jss4mu7hdnuhforcab61m7too6/fawona.pdfIn PDF document text
    • http://soundreaming.org/wp-content/plugins/super-forms/uploads/php/files/187973d1cdc6d2f696260ad3aa55df06/66698725502.pdfIn PDF document text
    • http://aj-freight.com/ckfinder/userfiles/files/77993218664.pdfIn PDF document text
    • http://urdu-hadith.com/survey/userfiles/files/lupupolebamevokize.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/jidadifapusafupomod.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c55c4ca93d5---paruxafufaxofimoxumet.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/ute78fgcdik4vcub40ddl7httm/vogimipomisof.pdfIn PDF document text
    • https://trouver-une-ssii.com/img/pics/files/bopipadelitebugodanu.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/18019262658.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160dfc8882ffeb---jamepewinexugew.pdfIn PDF document text
    • http://ltmetal.com/userfiles/files/88460333630.pdfIn PDF document text
    • http://careerdynamic.com/clients/3/3d/3d9dba0a3645e5854abf1db7654b9c86/File/kasovamawavawibapafar.pdfIn PDF document text
    • http://gattoneva.pl/pages/userfiles/file/dawupefogezetewelebuj.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077769006675---96582702712.pdfIn PDF document text
    • https://www.nuyew.academy/wp-content/plugins/super-forms/uploads/php/files/d5f08f3bc6ff50f33bce1c86f412bdce/82209634070.pdfIn PDF document text
    • https://sahodayabbsr.com/test/fckeditor/file/pobufobosugodow.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1610a9f78567d1---15241143710.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e38f48ca8---bafida.pdfIn PDF document text
    • http://songhandiban.com/uploadfile/file/2021071402530573499.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pajasusepanomubugeke.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=los+206+huesos+del+cuerpo+humano+con+imagenes+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_off0000ba24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA24 15560 bytes
SHA-256: 30ae94b67a22163f7322e36cedb98dc857a6298bad5b915ddc6a435d4df0110f
font_01_sfnt_off0000e067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE067 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1