Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef0fd8d2f270b3bc…

MALICIOUS

PDF

103.8 KB Created: 2021-06-30 04:12:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ecfe813f08f25e57cb27d3d84d748439 SHA-1: 4b552b682ff9e7e08147f52865c305d4cafc37e6 SHA-256: ef0fd8d2f270b3bc3d60af72f978d5273b9ee3db7326ce7af934c5563b2e2dfb
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to numerous PDF documents, many hosted on compromised CMS upload directories. The ClamAV detection indicates it is a phishing trojan. The presence of external URIs and compromised CMS uploads suggests an attempt to distribute malicious content or phish users.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3094

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://synerhu.ru/uplcv?utm_term=the+tao+of+wu+pdf+free+download PDF link annotation
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/brhtm6ja03641i5vgi8g9irhg0/bobulagonesusa.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/wesizo.pdfIn PDF document text
    • http://istrouma1971.com/clients/9/9b/9b88b062b8d6af44b28e209fcb06d7d5/File/nupusopimetepivo.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/89a6610e917db2a29b56c4a3c3bf7148/41797757069.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/43994785883.pdfIn PDF document text
    • http://fritz-fahrlaender.ch/download/67889793393.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160766e0c01f16---32517810643.pdfIn PDF document text
    • http://hiddenforrest.net/clients/76790/File/bonajuzad.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/mafosevobid.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090e8c3b7e3a---dodikul.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/97171442016.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/vebufesosekeropimale.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dacfbdd1e86---40254729604.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/tukisopazesimev.pdfIn PDF document text
    • https://rinducm1.com/contents//files/pezitabizonosubo.pdfIn PDF document text
    • http://porpora.info/imagenes/imagenes_contenidos///31337860233.pdfIn PDF document text
    • http://jaatkinson.com/userimages/50327530568.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d15c906f3145fdc13f6d5a3295214be7/3035434305.pdfIn PDF document text
    • http://bualuang101.com/backoffice/upload/files/fapagolofatuj.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/f8f8cbe09e032bf4f52f8aa877d5f020/kizonanulejesuralapodo.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a14c8df9b5---rujupeganowipopolanivopu.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609da741ab4cb---90606129869.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/ci3onne28n9i9gganejshdns08/virikapodonivojevafa.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ad883208370---61363529427.pdfIn PDF document text
    • 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_off00015deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DEB 17980 bytes
SHA-256: 1eff422f08ed605ef2d7a99aef26b7665c6752f25bfdd0fd908feb2158e490d0
font_01_sfnt_off000176fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.