Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c12f4e7973f9cf0…

MALICIOUS

PDF

76.9 KB Created: 2021-07-29 22:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: defd8b301f79fcb789948f4105a6b478 SHA-1: 7351b5ef9b50e5fabc4d1e9dc30bff62787e53e0 SHA-256: 1c12f4e7973f9cf028e77d5254b0158c3d1530e078bc4012262e61003057763f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 malicious score 0.8414

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 http://yuc-fac.com/uploadfiles/20210720143805.pdf In PDF document text
    • https://tese.in/ckfinder/userfiles/files/jagibotuserafanijurafivum.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ae63136dc5f---zezekajovifos.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/386772b3917023023cf79949750efd62/nomejedilifuxukegetoxara.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/99631184988.pdfIn PDF document text
    • https://bem-sa.com/img/file/91575883227.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/26915153669.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/15949398388.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f0ad95d83---89071433591.pdfIn PDF document text
    • http://france-ex.com/25262429682.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210510090632813.pdfIn PDF document text
    • https://deitratech.com/userfiles/file/zalekem.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca6b214a26---36677535170.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/kusifarigilakagifivemu.pdfIn PDF document text
    • http://jinistudy.com/_UploadFile/Images/file/53921345145.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/98851978473.pdfIn PDF document text
    • http://ruben.pl/ckfinder/userfiles/files/benanadasadix.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/rinowoso.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e1f84bf9b9---34574640661.pdfIn PDF document text
    • http://massageindex.nl/images/uploads/21995928824.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/4b8b606cd424b547c51198d3aced8a66/lotunuzitar.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/336f015ecea07b008990f5a0f6a6a9b7/javelenojesapegurulixaka.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/lnak3754eufibbfac26h1udoqm/84959806164.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/difozejexowu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=manual+for+bissell+lift+off+deep+cleaner+petPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f98b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98B 17444 bytes
SHA-256: 69d6e845be3387a40b69bcd26efea9c3f46a57e5cb5bfc29b7bb95cd00adf207

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