Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1507d930774ad3d…

MALICIOUS

PDF

84.3 KB Created: 2021-09-08 22:44:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 867b50f198d67865f11e36e1513641c9 SHA-1: 3e47fd12d271817b1c521c4ae4ca9cc1cf1cdd9c SHA-256: f1507d930774ad3deb0129c99f848b01ddb9a26f13de52afb76bbb2266553971
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, as indicated by the 'SE_PASSWORD_ARCHIVE_LURE' heuristic and the presence of multiple links to potentially compromised websites. The ML classifier strongly flagged this PDF as malicious, and ClamAV detected it as 'Pdf.Phishing.Trojan'. The document's structure suggests it is designed to trick users into downloading a password-protected archive, likely containing a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 http://futimisdev.com/userfiles/file/2071947330.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137e16942ef7---32190173960.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/finumimepukimeluzivovem.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/996abfa20ac59c72061d7eac79240edf/fisafiponawitex.pdfIn PDF document text
    • https://gdaniec.com/upload/files/wopudinaxi.pdfIn PDF document text
    • https://insolite.lu/img/userfiles/files/sanibe.pdfIn PDF document text
    • http://moscow-vernisage.com/files/files/38933890036.pdfIn PDF document text
    • http://omni-links.com/images/blog/file/favitewaset.pdfIn PDF document text
    • https://praktijk-fix.nl/userfiles/image/file/72054514936.pdfIn PDF document text
    • https://optimustelecoms.com/ckfinder/userfiles/files/33908800791.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161302193e991a---xatateriwinisimadufe.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/wulixifajitugupu.pdfIn PDF document text
    • http://gardena.crazyrockinsushi.com/uploads/files/balilojitamofadokepon.pdfIn PDF document text
    • https://bloomlight.pl/_bloom/file/27193686891.pdfIn PDF document text
    • http://professional-tuner.at/uploaded/file/17933728131.pdfIn PDF document text
    • http://curvesncontours.com/userfiles/file/62965126929.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131c19f9ff06---16613079406.pdfIn PDF document text
    • https://calienglish.com/ckfinder/images_store/files/61656921115.pdfIn PDF document text
    • http://erbamedica.org/userfiles/files/tasuwigixi.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/xabidepalujiwuz.pdfIn PDF document text
    • http://vucert.vn/uploads/files/rinixatife.pdfIn PDF document text
    • http://m3hotels.com/userfiles/file/14784535444.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=ultimate+ninja+storm+4+download+androidPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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
font_00_sfnt_off0000e360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE360 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB72 18176 bytes
SHA-256: 5fd14a7a8113fa29721086d276d2e42661668f4a004e3a93f9b7df7b052d4527
font_02_sfnt_off00012ab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB8 10708 bytes
SHA-256: 7506c1116650094cfdb8e1f64bcc46084aaeb5684c01413dd8d51f370c711132

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