Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce6f847f7fda07ee…

MALICIOUS

PDF

90.9 KB Created: 2021-07-03 05:50:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f9cf1b6bd9850b0295cf7e8946cd76d4 SHA-1: 7d95fb003d7050ecd3c4f23b48145052f6caa09d SHA-256: ce6f847f7fda07ee96ddf9c3d30c580a275df9b3790fd61cc97dbcc763cfcef5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely intended to redirect users to malicious content. The presence of external URIs and link farms suggests an attempt to lure users to external resources, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://crewmak.ru/uplcv?utm_term=chinese+video+editor+apk PDF link annotation
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/945b82609a86377d8a6130bce85b4e25/zuwinow.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c342a482429---5577339781.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b106c372aff---71147581113.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/9f7c66afkkllehmuv92us34l26/fuvimuvu.pdfIn PDF document text
    • http://toicodonlyson.com/uploads/files/sipow.pdfIn PDF document text
    • http://componentcnc.hu/uploads/ckfinder/userfiles/files/18408394931.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/f89c09a2ac1c4ab6527b3663a525d76d/gexakepibezug.pdfIn PDF document text
    • http://cappellastudio.it/userfiles/files/16611416281.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2e689d22d---momukoj.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/b48b4e14ddbb67a1aaeb315fb36a1388/71404295967.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/mimifikanumigega.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/b8c7b42bd0e8cfe741b2876fa8ea7551/vekobevasolevegopisamivo.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/6cl7fgm25qev69cnb10ug6bsma/81732478255.pdfIn PDF document text
    • http://apcmagon.com/userfiles/guwofeboxavijexi.pdfIn PDF document text
    • http://kingsfinancialconsulting.com/userfiles/file/17771342259.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070f5585870e---xurusurajidi.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/0c27552843882742f0fb7a2d2483d4d2/68032747052.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/31504745481.pdfIn PDF document text
    • http://closehorses.com/userfiles/file/fexijon.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/6b381030966a090785dd51014a0fb7b2/jixenifovikudirokabo.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/6db17b717fda38a2dd57c81c4e55a9f7/77199939389.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608483ff0b697---fegilegilinope.pdfIn PDF document text
    • https://alula.com/wp-content/plugins/super-forms/uploads/php/files/4cc52021df301b36c33b534b85fddfe2/risufezotelevomuwodo.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/veled.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9A 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_01_sfnt_off0000ffdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F1 17588 bytes
SHA-256: c94f2013d132175733ba925b1c30ab477eb5e8831168a9e96b7b9969096839c0
font_03_sfnt_off00014596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14596 10632 bytes
SHA-256: 3168e2b919bc0bbfe4b0b0b41173d4bc9609817df993d79ed4a65c0c25811185

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