Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e2ce07ed8feb53…

MALICIOUS

PDF

79.8 KB Created: 2021-09-02 14:31:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c35454c0a2b4751d89beeae9b92dc0bf SHA-1: 1f9fe186c42754ed2c4244441abc35a020907208 SHA-256: 07e2ce07ed8feb5377625ac20a61bd33c5faabef98090cb872a0528421976ee6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7162

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://coretry.ru/uplcv?utm_term=marugoto+a2+pdf+download PDF link annotation
    • https://strategieb2b.com/userfiles/file/sitot.pdfIn PDF document text
    • http://gd-weimi.com/upfolder/e/files/20210823190950.pdfIn PDF document text
    • https://traveletrust.com/basefile/traveletrustcom/files/sonosodadaviv.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec5f49eb08---fenefusasurokinaxi.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/10746826960.pdfIn PDF document text
    • http://szpk.hu/_user/file/wukewijabawadarujanor.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608e36302145a---banogelijakuse.pdfIn PDF document text
    • http://kvbm.org/pds/userfiles/files/6571202585.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/jirusokebopeso.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/4ecb43o56kobhje5i55gja33q4/daxagivo.pdfIn PDF document text
    • http://ankaraeksioglu.com/resimler/files/32784448296.pdfIn PDF document text
    • http://mabo-meccanica.eu/userfiles/files/kubavuwagilejikodoku.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/dijabewogudibenaxepusufu.pdfIn PDF document text
    • http://pusulacampeyzaj.com/images/media/files/dizozozosem.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16092e0c6a07c4---jarazafokonibigejipadaxu.pdfIn PDF document text
    • http://doubles301.jp/files/ckeditor/files/30467713218.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/16084cd879d581---59627499903.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/43603165246.pdfIn PDF document text
    • http://podhoru.cz/userfiles/file/34660972480.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f3d38f934---nikuxosufadalujono.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/kajunisenoporemivaxoba.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608b55ad0d67d---buviridirinaporat.pdfIn PDF document text
    • https://firsatpin.com/calisma2/files/uploads/fasisogijudoforamizip.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1611536c82e6c1---21766075783.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/3ba0a5ee7624b96ecd6725252c32b37f/vikolurixodomowezaw.pdfIn PDF document text
    • 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_off0000e287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE287 10580 bytes
SHA-256: 007b6415361dc5efbe37e0ccf9553ac86587c2a37bab771f2f6892255ee8374e
font_01_sfnt_off0000fab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB4 21424 bytes
SHA-256: 81bb4855078d46d2d386773b19b8e7744dd7a3bad94e3b57834ee2177adef0a8