Malicious PDF — malware analysis report

Static analysis result for SHA-256 3228c91e932a56c0…

MALICIOUS

PDF

63.8 KB Created: 2021-09-01 03:00:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7e278f010ce40a7f279f9ad9b25a09a4 SHA-1: a3b5a6002fa8076dec7dd0017b498cf79669cbc3 SHA-256: 3228c91e932a56c02baa85fea2684dcf3b8ed6a69eab28d87e229a85c7ec77ca
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure suggests it's designed to lure users into clicking links that lead to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9364

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://maradonasalud.com.ar/ckeditor/ckfinder/userfiles/files/vodapivazumuguvogup.pdf In PDF document text
    • https://lesura.net/userfiles/file/94073240699.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160967b46934a5---sutadazepomisagibakefox.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1611a603a4ac30---30665983780.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/bidifupaja.pdfIn PDF document text
    • https://conexkarvan.com/cache/fck_files/file/92740081450.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16123a9a982863---90547424983.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/rinukofijubufexiguwamakiw.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/105a56b38017fedac398ff487c9a1e46/voxirekojoje.pdfIn PDF document text
    • http://marsalanoleggio.it/userfiles/files/fonurisugusixede.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eceb4d87b0---bafiw.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/1629a9bfa9c13132c103291de748414c/33886956073.pdfIn PDF document text
    • http://www.physedu.in/newsite/userfiles/files/monazonalek.pdfIn PDF document text
    • https://kemxoi.vn/app/webroot/files/images/pages/files/zijatumi.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/5979f23614891b2518e702ee54058b6d/wadomututajeruxi.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/93960991708.pdfIn PDF document text
    • http://51-lq.com/userfiles/file///rinaronofelevatipinubi.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/85098281958.pdfIn PDF document text
    • https://usssecuritate.ro/userfiles/file/17537895623.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/ccbb02ee73a14307476aa66795571fab/vesifekudumibefofamalit.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/38pactvralfl1ulgk8kc1mgqbj/xawavadufegawofexedisime.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/4485672298.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=mickey+mouse+space+adventure+coloring+pagesPDF link annotation
    • 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_off0000e1b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B2 11220 bytes
SHA-256: c004e57723e972411a989b8da3f167c1835cce4912e8f441993c32d182c59b51

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