Malicious PDF — malware analysis report

Static analysis result for SHA-256 3303157715551d5a…

MALICIOUS

PDF

78.9 KB Created: 2021-09-11 19:52:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a153f4db9725140e3c248113d09c45cf SHA-1: 7305e61de01afe4587e7a8f3cae5f2e227abb346 SHA-256: 3303157715551d5a2ecaff82da1ffe5b19386f15e8e1839da466aa10a0bd4c1e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to compromised WordPress upload storage, indicating a likely phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. The primary purpose appears to be directing users to potentially harmful content hosted on compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8140

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://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/unrjh7is5dp8bl9gpnbq72t80c/mirubisejasefur.pdf In PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/6fc46525fba547e08bd3fa314003dcc9/divanetikozosi.pdfIn PDF document text
    • http://xn----otbbfbbknchz.xn--p1ai/sadm_files/kixupagejakuki.pdfIn PDF document text
    • https://flcevent.fcu.edu.tw/plugin/ce1/ckfinder/userfiles/files/20210905075611.pdfIn PDF document text
    • http://cichanski.com/Upload/file/mopovowepixijufarewoseri.pdfIn PDF document text
    • https://pristineleather.com/userfiles/file/zatuzarek.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133e378abc36---11894270971.pdfIn PDF document text
    • http://kfoodntea.com/dataroom/file/sijebasosodudozurepuvif.pdfIn PDF document text
    • http://sedaciesupravy.sk/media/file/falekotovezafotutupono.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/53350797005.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/muwijixenenifebewovebazu.pdfIn PDF document text
    • http://kingsfinancialconsulting.com/userfiles/file/jevidof.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613af6cf94b74---34247949650.pdfIn PDF document text
    • http://gabident.pl/local/userfiles/file/nalupizopom.pdfIn PDF document text
    • http://friulanapanini.com/images/file/girufilaxopataw.pdfIn PDF document text
    • http://sladkiy-ostrov.ru/userfiles/files/75271798712.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/ponid.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/5208caac9a21136cb8a9a1c2167ebee0/febuvaxitamam.pdfIn PDF document text
    • https://www.opsclown.it/ckfinder/userfiles/files/pisurojuxipufisoted.pdfIn PDF document text
    • https://ashasuchikala.com/ckfinder/userfiles/files/kojisisubugedukotojesas.pdfIn PDF document text
    • http://guitarenko.fr/img/files/vifobajezatojima.pdfIn PDF document text
    • https://0900107678.com/upload/file/rosupawenifitatenefogex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=shape+face+haircutPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D0 10312 bytes
SHA-256: b8829ed7d45a15bf42bc30d94e4fff23191fa2e14bb438e750d878dcd4493ad0
font_01_sfnt_off0000f835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF835 18272 bytes
SHA-256: 5570bbe90eda5bdc73433c5873b2b16d25d25be1faa15322af0d9d4ddf3cd919
font_02_sfnt_off000126fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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