Malicious PDF — malware analysis report

Static analysis result for SHA-256 d06893b8f33cfba2…

MALICIOUS

PDF

80.4 KB Created: 2021-09-05 01:09:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2413546533aef15629fb603f7188047f SHA-1: 60133199c3c00a0341defb2552f8c3a98d857c43 SHA-256: d06893b8f33cfba27012cbcd597cc350cf3ce061a22b0cdac340b81ed86868a1
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to domains flagged as link farms or hosted on potentially compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery through these links. No scripts were extracted, but the structure and URL patterns suggest a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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
  • 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 http://yournamebadges.com/withyourdog/cms_uploads/file/57992747647.pdf In PDF document text
    • http://controlsystemco.com/cache/fck_files/file/nojoperenuzotuvipulazukux.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/20302f68ba4cfe01f4831ade7a601afa/niwigabetomi.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/5a2f68254278a9a61c1dcd71db357599/58416659878.pdfIn PDF document text
    • http://jakebenmd.com/clients/0/0e/0eef9d569b11303d075d19626cc6f958/File/bidebomemowupetamemaf.pdfIn PDF document text
    • http://baggiez.net/userfiles/file/13514940016.pdfIn PDF document text
    • http://poorclarescork.ie/images/80628126768.pdfIn PDF document text
    • http://kapsalonindex.nl/images/uploads/saxexeketonaso.pdfIn PDF document text
    • https://capital-tic.com/upload/ckfinder_temp/files/20210611080725.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/a0d8a1b08ae28022e2918f1636159fd4/93965141839.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/xekiw.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16126b3fac8ee2---35174806266.pdfIn PDF document text
    • http://arisutour.com/ckupload/files/zirixopopufota.pdfIn PDF document text
    • http://jessie.vn/images/ckeditor/files/mutisijibemawamesawafutol.pdfIn PDF document text
    • http://mishelik.ru/userfiles/file/weradinuvivuzoluji.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6a8ae529c---55122919869.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/161338e03d118c---15016115785.pdfIn PDF document text
    • http://moon-villa123.com/CKEdit/upload/files/56070248572.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/19755914038.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/ee2cdc1eda86a4118d9e2dab26f88f16/80708683436.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160fd89dfa08e7---67125456134.pdfIn PDF document text
    • http://mtsskzy.com/userfiles/file/24827363818.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/2561523ff1311035195bddea8b09b395/boloroziluxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=sigma+bike+computer+manual+wheel+sizePDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751d0a5fca4---gisumepunikazixanumenagaf.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD572 11376 bytes
SHA-256: 6d3bf966853ef6a2c9e8ce756190191a5e346259cb38ccfdde81089b8a344e87
font_01_sfnt_off0000eff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10804 16972 bytes
SHA-256: 4b507f7d1515c6e6d808db392af3f93243ffb4541b750f61cda435ab10988f2a