Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff0a3fc2ccfa4c1e…

MALICIOUS

PDF

85.2 KB Created: 2021-08-05 17:49:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 01e31f31c101e032f2e830f4c019561b SHA-1: 8aaa7ea9b33307c9c025fa8a61f03b266f2e4e49 SHA-256: ff0a3fc2ccfa4c1e72a512896dee8cf61f4274b646d484319dd3edc4d50ca7fa
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as containing a link farm pointing to potentially compromised WordPress sites. The ML classifier and ClamAV also identified it as malicious. The embedded URLs suggest an attempt to redirect users to external sites, likely for phishing or SEO poisoning, which is consistent with the 'Pdf.Phishing.Trojan' detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160fddf5ff1763---kajerozowibomibokasuzeko.pdf In PDF document text
    • http://frankslawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jozaf.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/54364361938.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a9d54b9f5---50965494099.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/84a81200b5c63f6ab935ecb6fd155aa1/danagemawuxalaxukogar.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/nra70dej1cmh7mkbgsbqjg815q/taridumusususujojewa.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b872a3963---20115218428.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/4ako7bhcfn3ik376psoiq5lo77/79928446517.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160ab841fab535---giwafep.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/43029743190.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dda027b334---xejuk.pdfIn PDF document text
    • https://borgopitti.it/userfiles/file/lusujogogulowu.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2f166bf2f---45829675720.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/sufuba.pdfIn PDF document text
    • http://americasbestwingsbeltsville.com/uploads/files/14880532245.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/ba3dc74e6b5ec25806e8b0f857e8f7ed/wolub.pdfIn PDF document text
    • http://ipmarketing.net/userfiles/file/11824661877.pdfIn PDF document text
    • https://hostingalani.com/calisma2/files/uploads/popixapar.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/jesibe.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/848cf650dc592d5e96b4f44d09d359f7/23094260878.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/1621b533f1401a83df1cc39f1cf5a019/zulobumakimejesomebitipaw.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/50e6aacc73c5cb30b10119a0594572f6/74091642030.pdfIn PDF document text
    • https://agroadvanced.com/app/webroot/newsletters/editor/files/31750959778.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=why+is+my+whirlpool+tumble+dryer+not+heating+upPDF link annotation
    • 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_off0000e97b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97B 11272 bytes
SHA-256: f3766bfdc85f140d2fe600e197f27c85d2f64ce7fe53aba732409ea3327edbd6
font_01_sfnt_off00010356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10356 16284 bytes
SHA-256: c0d93f4fde057272f3969bdbd73bdd3a46ae5f2e019c1a1dea1e6500478901c7
font_02_sfnt_off00012d21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D21 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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