Malicious PDF — malware analysis report

Static analysis result for SHA-256 d199f2f57094e9e2…

MALICIOUS

PDF

62.5 KB Created: 2021-08-05 00:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 30eaed9ae43204ede6183952bb7e6e41 SHA-1: 1e2e69f1701012ef30bf195cb90401059fa0023d SHA-256: d199f2f57094e9e2ec36e9ff65af83900ecb07c8fca101c6a52a6154d03262f5
154 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate maliciousness. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it's part of a phishing or credential harvesting campaign. The document body is heavily obfuscated and appears to be non-readable content, further supporting a malicious intent rather than legitimate document sharing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9043

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 https://allytemp.ru/uplcv?utm_term=can+i+get+a+passport+renewal+form+online PDF link annotation
    • http://satakantaresort.com/user_img/files/dotomutole.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c12c9954dcf---91935946188.pdfIn PDF document text
    • http://hissekurban.com/resimler/files/85859514726.pdfIn PDF document text
    • https://brazilairporttransfers.com/ckfinder/userfiles/files/59335177300.pdfIn PDF document text
    • http://gianniarnaudo.com/userfiles/files/2050724226.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608c03b35fddb---bogasupadovuwete.pdfIn PDF document text
    • http://woori-tour.kr/FileData/ckfinder/files/20210726_9FE0FC950B7FD1EA.pdfIn PDF document text
    • http://galluccifaibano.it/userfiles/file/28501878255.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/e6aef5fa4db576a51ebdd879abebf3fa/foninipilun.pdfIn PDF document text
    • https://planet-pvc.com/upload/files/wogebazogegolekubinu.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a0fb9684e---74629091305.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c95f78e402c---tajizajojexalubimagimopiz.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0817364baf---xavuvoramexasu.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/fb4263c2c8862aa66fc6e924cd1f6adb/zoxosepariwagebutugibosi.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/7dfc74418c33d4e3e33962baaa4edc59/78070172950.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abd662b651a---64049185697.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/13522892924.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/g7utgqnio26375733f9scgcjg0/50859013448.pdfIn PDF document text
    • http://agiteam.org/clients/b/b0/b0c4817036ef1cb73596cc935f3fa86d/File/lamigexifadu.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/zolilodoguduwexiwedidub.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/85541964100.pdfIn PDF document text
    • http://brooklynsmokeshops.com/admin/images/file/tifanu.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a570b490720---40640592026.pdfIn PDF document text
    • 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_off0000ce8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8B 10816 bytes
SHA-256: d0971d3ce6e9a30a75473381158fbc4d188f4091ef0fd3f350ceb4fbd729225f

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