Malicious PDF — malware analysis report

Static analysis result for SHA-256 05be4c21874b49d2…

MALICIOUS

PDF

109.4 KB Created: 2021-07-14 07:05:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 21a361616dd66b34e2ec6e4941ddd8dd SHA-1: 22aba947f99dab8212d858b4b0b20dc6b1030d20 SHA-256: 05be4c21874b49d2e06233f078ee521b638708e5d92b40e6748138cc325d5659
124 Risk Score

Malware Insights

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

This PDF file was detected by ClamAV as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3480

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.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a867c68a38e---gedefa.pdf In PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/99328650176.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a272259aa---14644902125.pdfIn PDF document text
    • http://bachtungcompany.com/upload/files/32007069010.pdfIn PDF document text
    • http://jarauwerdaenzn.nl/userfiles/file/jomapijiwudemitax.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/l09da2qkg8lr08so6nhfisu82a/xigida.pdfIn PDF document text
    • http://udmvdpo.ru/images/files/89874767977.pdfIn PDF document text
    • https://korzayithalat.com/spot/admin/fckeditor/userfiles/file/97951874660.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c22b38df6af---kimudeluwana.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/98951262252.pdfIn PDF document text
    • https://viratrip.com/basefile/travelasreviracom/files/rusimuvezonuzirazoxowili.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/67925133938.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098450617406---rowopubunoti.pdfIn PDF document text
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/bipuvagozimutifipub.pdfIn PDF document text
    • http://123podkrovie.sk/editor_uploads/files/vunivawovebip.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/36ac1da4feae32bf11f13e4dd16eac99/torinopujaredus.pdfIn PDF document text
    • http://szkolka-wiercioch.pl/files/file/peferezoxixow.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/wefepegifalabusapixixa.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd549e0fd3b---48536805514.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/89893534430.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/222e5aa4bacdf907c3c47f5911c4315f/buzozitawu.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160de235037847---xafifevujotupet.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bd2a5985c69---27013383951.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/dojimagukesebugoxuduvu.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608315dc2a96d---64124496020.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=the+hero%27s+journey+questions+and+answersPDF 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_off000178c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178C9 10872 bytes
SHA-256: fed5c1e1907ebbbc253f69bbe8e9106d9faeb8e20b201fa47c33698b44d4fe0b
font_01_sfnt_off000191cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x191CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1