Malicious PDF — malware analysis report

Static analysis result for SHA-256 12819b0c75cbf60b…

MALICIOUS

PDF

78.1 KB Created: 2021-06-30 14:36:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 24cc64d4334a3a5e0f2ebe69af145922 SHA-1: d6c06252dd58634278b0859ab1a2d581212c81d2 SHA-256: 12819b0c75cbf60b2e16b437246daa784515415e6aa71cd6ba47372e3424b7ca
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains. The ClamAV detection and the presence of multiple link farms suggest a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and link farm heuristics indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4580

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://smidgel.ru/uplcv?utm_term=three+little+mice+song PDF link annotation
    • https://alternativecarrepair.com/userfiles/file/21396088783.pdfIn PDF document text
    • http://techbis.pl/files/file/jusutalosumoti.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607305b1a9d82---66062478955.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/31848894348.pdfIn PDF document text
    • http://modero.vn/upload/files/41059186867.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/vtfha0p92u55vkg6207gc1m0kp/bifokugunaborerixesumagid.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/kqgle7sacr407icabubud0u38u/66468024738.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160796fdd26a08---51306340209.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f77dc73cb0---66150581838.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160864ce473ef7---govulafepegejevotumavovu.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/29404622241.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609bde40644b4---dutujomovipume.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2349a3719---raxisegejutejuneteme.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/s9a9me0e69da0s8494et59e07n/kijupujuxufakefufa.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074fadd8df3f---kofelulunozopas.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d37199c60ba---46999544843.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/7fbebea7dc9d0d7524c1b864aa4f52e9/jojaborulu.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/1047573450.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5f4b0e40d---1526227399.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/b7ttul8ccb6vf8d755du0chros/77096427419.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/sigugunirixukezoke.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1606c89d216165---67036616214.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/bumadirakosijanizejeguna.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/85d4d9125818a8f76c86a329ae78007b/malezemu.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_off0000eaeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEB 10476 bytes
SHA-256: 50cb0a1642dd942d18e2385ef638bb60171dbae1ca87e8adec2f6014202f3ba5
font_01_sfnt_off00010284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10284 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd