Malicious PDF — malware analysis report

Static analysis result for SHA-256 18340f4e330c5ee2…

MALICIOUS

PDF

212.1 KB Created: 2021-06-27 21:55:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4d5a306d28d14fc860a09aaf25eb3504 SHA-1: 6ad52de51c543f967dcaac8b12cdb77b68555af4 SHA-256: 18340f4e330c5ee2f1147369e7147756aa70276e77700cf15138b101b8252d71
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3089

Heuristics 4

  • 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.
  • 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://smidgel.ru/uplcv?utm_term=meaning+of+time+keeping PDF link annotation
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608b412216f80---rokenenubifinalirivefu.pdfIn PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/44852977575.pdfIn PDF document text
    • https://carlojans.com/cms/file/74667485060.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c89afe8bb8a---88057146492.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/kuwurap.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/2suk0lfoireft1rgmr66bqs39i/76645703142.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/fagakusetotile.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/mefisepexob.pdfIn PDF document text
    • http://catgarner.com/clients/873270/File/dokizarisef.pdfIn PDF document text
    • http://haithuanphat.com/uploads/files/vefawetidokasele.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/73599246070.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/5decg89tr2oki8vo3oiold6shc/94374092509.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/c04924cb18a2ba96363b6b3bd969dc7e/33545950171.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608288c0ac955---zimoluzetedobawimibufuvo.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/a8e4cd9f704f16dbc5f2e10aa2f05ee0/kajolilonugaforab.pdfIn PDF document text
    • https://daulte.ch/ckfinder/userfiles/files/vawowap.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608338ef6a5a1---vuxuvojojefoxag.pdfIn PDF document text
    • https://spheresignal.com/app/webroot/userfiles/files/taripisesididiru.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/26ed68f22f2de9df6314adeb96c7a703/ralukebisowutif.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc64fe11f6b---lejavomegisala.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/40134066325.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/62b50125595aaa69d33b4cc0c35b8aab/91089311526.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb290a2048---85364645599.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/muqe05jgcdamsf4pu2o1hc8tm2/rezuwiwadevujezefumin.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/6860f807775091123879b1857eebd192/94772029599.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00031ebe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31EBE 28483 bytes
SHA-256: c2a128b874c42fd5efa627b02dd53b5f7232f97f987a28cd2ef496c80fde67d3
font_00_sfnt_off0002afb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AFB7 10472 bytes
SHA-256: e88a874c436f1dd990a3e7f7a3769166ca796c236955fc956e98339505150af2
font_01_sfnt_off0002c77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C77C 42076 bytes
SHA-256: 300c432556ddac0aeddf8828982597406619627341150ff3729e733db2c3183a

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