Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3f273918e549837…

MALICIOUS

PDF

83.2 KB Created: 2021-07-08 07:22:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 9d7b164688e2645bd6fedec5e37cc2f8 SHA-1: 5967841f597f3f319d32194bda718e13fc7aec67 SHA-256: f3f273918e549837492c057e7fb8a1d420d0696f57a0b02b1c8fe785d1a03f9d
124 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely to lure users to phishing pages or download further malware. The presence of numerous URLs, including those hosted on compromised CMS uploads, indicates a broad attempt to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4300

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9be33cad44---3471062412.pdf In PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/113cce0060a0136515f7ff54717b5a5b/78430854040.pdfIn PDF document text
    • http://luvnchrlysenglishtoys.com/clients/861429/File/73738841509.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/cvk7d5cg0e0gpbvm5sft8pbfcg/43723568531.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9d0c9fcb9---lokufipufenodazowavagosel.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/fbb0534c40de20d6f3f59f7f297e421b/91916202800.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/regilomor.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8e501965b---xikikikoditobes.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd566993cf---70847430055.pdfIn PDF document text
    • http://tycoonmedical.com/userfiles/file/wunukalokaxiwan.pdfIn PDF document text
    • https://argumentua.com/i/file/47558965178.pdfIn PDF document text
    • https://koetec.com/home/~ptow/public_html/ckfinder/userfiles/files/97599578588.pdfIn PDF document text
    • https://777mto.org/contents//files/tenegolekefepafidajijuzeg.pdfIn PDF document text
    • http://dentherapia.hu/files/file/kowomoxudake.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/be7591130c45d949979943cf36ce2d89/98280893047.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/j7ho1dv5g0ap50v16si8rrb242/13714497119.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc39faef70---40527262919.pdfIn PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/nevupepazepexafoviki.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/39161395472.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/41932637816.pdfIn PDF document text
    • https://superpart.com/files/25461916085.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/80207697691.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/a7d7a9847b389b67341685d29ef35347/12669950170.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/figavakebaxadafa.pdfIn PDF document text
    • https://sukhayurveda.in/userfiles/file/motivomaxogexika.pdfIn PDF document text
    • http://ashioke.com/images/library/File/xupafiwak.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608236dab381a---85003226018.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=sunroc+water+fountain+troubleshootingPDF link annotation
    • 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_off00010317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10317 19852 bytes
SHA-256: 05dac84b0aacd39d01f0073ec80cbaa76254973e8af2c519d42007f39d1bd52b
font_01_sfnt_off000137d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1