Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1b2ea41ef062ceb…

MALICIOUS

PDF

58.1 KB Created: 2021-09-01 05:38:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 847634d1da1a8b32d6aff7f78e31bb29 SHA-1: 6f4757ccdf86a7b6e14da95126f99c9308f51640 SHA-256: d1b2ea41ef062ceb7f80a276916e36152b275394ac4af3d87c184d85fb6a3eef
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file detected by ClamAV as Pdf.Phishing.Trojan. It contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of JavaScript indicates an attempt to execute malicious code within the PDF, likely to download additional payloads or redirect the user to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6034

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 http://jingyitech.com/uploadfile/dajufewupegesapatagute.pdf In PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/1bc7af611cb7e5ba779ec4a55434d303/23034270828.pdfIn PDF document text
    • https://isosklo.cz/uploads/65677862111.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/be56a2ed6637820a9df99dec6ce5356e/tinerozigim.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/e596e043cdffd1947758419924bb452e/wajowaporunejuloweneju.pdfIn PDF document text
    • http://thaoduocvn.com/userfiles/image/file/wirugeri.pdfIn PDF document text
    • http://khacdautron.com/Images_upload/files/62182062860.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/6721dc6b4eb0c4b7e024a089e0d4e98e/jiximekor.pdfIn PDF document text
    • http://due.pt/js/ckfinder/userfiles/files/47421472972.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/1c5afa28379a200cae1c5973bb4d5307/likagegajuwokusej.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/kojop.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/ritibod.pdfIn PDF document text
    • http://onboardviaggi.it/themes/userfiles//files/sufikubevozofifivavijum.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/48627964210.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/0be910664567dc2e8a01a3f74d45842b/2669357226.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/d9ae50dec41e9e97761e7a7a440e7f93/vadokegodonegil.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f50b0f1e0---bobagitaw.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b648770ac42---ragaxitezefinadawedamoki.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/84521995248.pdfIn PDF document text
    • https://bitree.com/ckfinder/userfiles/files/tovuxid.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1609b97c7a8ea4---gojapafave.pdfIn PDF document text
    • http://acupunctuuryao.nl/ckfinder/userfiles/files/70112995499.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/desutomixo.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/69686403838.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/a261c0184cb7376dc15baf5d45196f53/nomex.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/ekaflrqdebr7i2dk6sej2t85ms/2710735182.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=rely+phrasal+verbPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1