Malicious PDF — malware analysis report

Static analysis result for SHA-256 d35fd4e4c9f1f04d…

MALICIOUS

PDF

76.2 KB Created: 2021-09-05 12:53:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5c265bc498cc60ad42bd4204b5f39ebc SHA-1: 454456c42588f17461c4809eac8048e92d83ef47 SHA-256: d35fd4e4c9f1f04d39d7f833eee7f3fb41709753f580e67623436d4d37f566a1
154 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and ML classifiers indicated maliciousness. Heuristics identified it as a link farm containing numerous URLs hosted on compromised WordPress sites and disposable domains. These links likely serve as a lure to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5631

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://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/594c3488325fc55b0c866cccb277cd69/11201243897.pdf In PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/34457bc5dba41ecedb6a202c4ae71b06/23943799629.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160875adba4906---90588020883.pdfIn PDF document text
    • http://zeguvietnam.com/uploads/ckfinder/files/10835172215.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/844db28bb1345686da12e5a6c4897016/79022750381.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609712dd009bc---jepujipipopudatolijirugu.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a440ddc4caa---sovovepujijatejavulimad.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/vabiwabomuvatafozemu.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/27372648632.pdfIn PDF document text
    • https://windsbs.biz/files/file/tuzutabowumivodolefape.pdfIn PDF document text
    • https://sim2007.com/files/7831353975.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160e276c944414---moxid.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/gugalowasatezop.pdfIn PDF document text
    • http://thayloilocnuoctaihanoi.net/upload/files/xapipuv.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/91304470247.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/39cf3ec017c36317f4d09c6e77672692/34081147778.pdfIn PDF document text
    • http://szkolka-wiercioch.pl/files/file/61225056102.pdfIn PDF document text
    • http://actlogistic.vn/upload/editor/files/xibovotolu.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/ief42bcele41tob5slk5uop28h/sibebok.pdfIn PDF document text
    • http://metamorfoza-krosno.pl/userfiles/file/32108526184.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2d0fcbfa5c---juwiniritujoritapamiril.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/42155101371.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/f690b825cce39f00a398792eff629cf5/lakazog.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210523204357696763982.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f3b9b7a30---19872245027.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=cwc+recruitment+2019+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_off0000e094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE094 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AB 10964 bytes
SHA-256: 34e3533604bc8d68337414fe8884b3f6683e65d7ebf3ec3a68f9954142f9f63d