Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f65a087dbb15a6a…

MALICIOUS

PDF

70.6 KB Created: 2021-09-05 22:01:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1b2ec1669fee60cc1e5fa69a2009ed93 SHA-1: 9b4d561cfbea9ef23c18c497b2e84f89cc2448be SHA-256: 2f65a087dbb15a6a75f235f8985982d0a4773c4fb237057df79e2efb18d617ff
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains numerous links pointing to compromised WordPress sites, specifically within form upload directories, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of external URIs and the nature of the links indicate an attempt to distribute further malicious files or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8257

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.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc63198041---likewejokatoleluje.pdf In PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612100ecc3eee---73591445739.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb12d89c31---45742636123.pdfIn PDF document text
    • http://thegoshow.net/userfiles/file/26383319252.pdfIn PDF document text
    • https://arket.io/wp-content/plugins/super-forms/uploads/php/files/200toitrgcnp7mg5fgvot9le1v/wupikezewupogenuwop.pdfIn PDF document text
    • http://myflora888.com/ck_files/files/50046161322.pdfIn PDF document text
    • http://newdimension.su/userfiles/file/xokogusol.pdfIn PDF document text
    • https://ubitanduk.com/contents//files/navofasudip.pdfIn PDF document text
    • http://getvisa.ru/images/File/35923782508.pdfIn PDF document text
    • http://montagnobozzone.it/userfiles/files/49521757611.pdfIn PDF document text
    • http://chinalabware.es/d/files/67018690180.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/90626871965.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c82925f9ae---41187188187.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb58febb2c---bijatanapuwagifut.pdfIn PDF document text
    • http://myphamasia.net/upload/files/28648053054.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4e1c9a2844---65468629739.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/5g6nb4abtugjtae93p00bhucli/55636821362.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec821106eb---murezukopunubekasisimel.pdfIn PDF document text
    • http://biogenetec.tw/image/files/20210723_012138.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/cc561694ae2b55ca6405b46b7f2a01c0/watitawepukulekero.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/d5acc0226a396c2701fdb9d6c3ba01b5/tonalopekulu.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16089e26c84a55---4609355496.pdfIn PDF document text
    • https://sudhirsachdevaclasses.com/ci/userfiles/files/74098936430.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=menadzment+kvaliteta+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_off0000c875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC875 10484 bytes
SHA-256: 7378c1771bd1213688445e3636df77e33f689354d936624c44332227951bff03
font_01_sfnt_off0000e03e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03E 21112 bytes
SHA-256: ccc07c54fef5fd3ce61bf676137f0b4e8ec47d57e77fca27016fa525642b28a3

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