Malicious PDF — malware analysis report

Static analysis result for SHA-256 065873d3ac565788…

MALICIOUS

PDF

79.0 KB Created: 2021-07-30 11:35:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 85d22f19cdf6d7c2ec2ae672251ec5c7 SHA-1: 90549d162ad1981abe8484fdc6e124ebb7d4c905 SHA-256: 065873d3ac565788adaa80580622c5f4f75fa7bdce54b005c32a862f6f8fe161
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 0.7117

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 https://petikdaun.com/contents//files/12276850176.pdf In PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4d0c5f93e---18969133796.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/a85b6601199fa0cd614494226d503b02/kimubugazu.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/jekogodidelepexovi.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/3dad09398f6891893a595b99ad827ec0/34842912071.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/8f7955590d7369025aefd2948287d225/wogose.pdfIn PDF document text
    • https://ksboutlet.com/file/files/diketomerakewiwotexaga.pdfIn PDF document text
    • http://dennehylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bedurovubisovutewozerulo.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608648c7e157d---tevozodeneg.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/73301749091.pdfIn PDF document text
    • http://ideviceplus.nl/app/webroot/files/userfiles/files/karagatajo.pdfIn PDF document text
    • https://tese.in/ckfinder/userfiles/files/33023737040.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d54da17dac---tubepi.pdfIn PDF document text
    • http://studiogaleazzo.eu/userfiles/files/33005037210.pdfIn PDF document text
    • https://promise-land.com/upload/file/bituxosabuwuzegawa.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/xukasuvuxi.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb3bd844ca---nupojiv.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/3240a5a778acbadd820a3b69c56f9b05/42896974637.pdfIn PDF document text
    • http://staceyasp.com/UserFiles/file/xigaxinutivuwel.pdfIn PDF document text
    • http://pattonbrayboy.com/clients/8/84/8444fd18e659e4cf0f5d78ff5dcadce3/File/37834972942.pdfIn PDF document text
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/33047414116.pdfIn PDF document text
    • http://gps-ambroisie.com/ressource/site-image/files/12934335505.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+write+a+police+report+on+theftPDF 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_off0000fab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB8 10488 bytes
SHA-256: 7eb5797f23a7860115647527563f4070b471f229728e718bd32e4de76b04b4ce
font_01_sfnt_off00011278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11278 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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