Malicious PDF — malware analysis report

Static analysis result for SHA-256 9197ade017d61fb8…

MALICIOUS

PDF

76.2 KB Created: 2021-08-03 21:15:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2640828c3a13c06760ea720c246cece0 SHA-1: 2c55c5defc75943714e4085ef1b163d9e53f1676 SHA-256: 9197ade017d61fb8909d3320f23a7a9615e3f06429bd511bc0045028e8e5625a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of an attempt to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6658

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://thegioioto.store/upload/files/wusezexijexijutuwe.pdf In PDF document text
    • http://minhledtran.com/luutru/files/79994226409.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/pufutubab.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/fu99ctv1jql04rvha535h4nea7/92948639989.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a59a5089044---fufubebigakedod.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b18387185c---24487820925.pdfIn PDF document text
    • http://deepakbatteries.com/uploads/file/jiwajiriwimitunoki.pdfIn PDF document text
    • https://aiwatopup.com/ckfinder/userfiles/files/tevarojare.pdfIn PDF document text
    • https://studiovizia.com/webroot/img/content/files/16075007071.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/ce4f89436fc56314444575e813436c2d/97757912693.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/41pjja3smpl6dbs1oafrq90big/suzobebipopefapeluf.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/c63885eba73fd2a28e0a4ee541d40292/notofobusujapiwifojuj.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/35e9da47e90ac0a6502efd4212351026/bekiwoxudopaxomazin.pdfIn PDF document text
    • http://voijin.com/userfiles/files/44527346535.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160807d8a777f3---4209951768.pdfIn PDF document text
    • http://areaengineeringsrl.eu/userfiles/files/dununamiditidowesa.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160717de31524c---jigikirabonapiwip.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a7cbd62da87---25926734168.pdfIn PDF document text
    • http://www.biotanika.pl/upload/file/27465204256.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16079b7fbc4085---95219029574.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/xuvuvexikopipozuwumo.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a445db96c---98726588186.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/1immknbavfp407rbb8pivnd4r5/12410241380.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=baixar+como+eu+era+antes+de+voc%C3%AA+megaPDF 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_off0000e6a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A7 19488 bytes
SHA-256: 8aaae54bebff01a6255b08d9cb2e890fe91fcfe0e2c82dff3a3aaa0f348abcd5
font_01_sfnt_off000115dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115DC 11148 bytes
SHA-256: 52541bd987675e373543e2673660fa55203b9a2fc2e215c7e3b09b2d6e4a9474