Malicious PDF — malware analysis report

Static analysis result for SHA-256 60822ebefb47ddeb…

MALICIOUS

PDF

107.7 KB Created: 2021-07-06 21:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: bfe35189bcb3eff909e64f3061e22493 SHA-1: e5c72a93c1e68663aa0d74b7a9549261d6e5c829 SHA-256: 60822ebefb47ddebd5fe442e9eacc70e93cb17776943f8ca3bff0e8a0f525521
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6ecf8fb13---52201277238.pdf In PDF document text
    • http://hoshitorionline.com/uploads/files/jogofogekofobipetakiponos.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071025178dcb---67866082607.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aad899e23a3---faribu.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/c267a9cee0f4b1d8f5ad73d61fd9935c/ruzapujokifetudenil.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/a1b39a441f3071528269df2934b384c8/xosexipafefakazizaxi.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b2cc454b8---pitujevijixerolorebi.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/4771b53ba2f68d81728551c5a7781b7c/88767443444.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/63c087fc277ee8d114e6355f6254a2ac/lowusopek.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c3426de5938---dikagotinok.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/1c4a6a411d75c7067433d10493f8482e/82788320915.pdfIn PDF document text
    • https://auto826.com/uploads/files/fijimupupiworotavuf.pdfIn PDF document text
    • http://www.rotudavid.com/ckfinder/userfiles/files/wofum.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bb1d39ad6b5---89948917942.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/62390149970.pdfIn PDF document text
    • http://bhsclassof70.com/clients/a/ac/acf0241a72c9eb28a719a759cf8a4748/File/fewolazawe.pdfIn PDF document text
    • http://kingcraftviet.com/uploads/ckfinder/files/24484761700.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd10552d21---81743973488.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/fevususexusix.pdfIn PDF document text
    • http://101-games.ru/images/uploads/files/jemajazufutasem.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16076fa642fe8d---83522466722.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/951ae8b2fbc9d12afe64889760146598/79879897516.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/wazunuwet.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2f921fa6a---rejofojakuzugugavudono.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=pie+chart+worksheets+6th+gradePDF 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_off00014002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14002 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15814 18292 bytes
SHA-256: 59cfc6795f730d4ee4371d58c2ae7de5dd5a7d3df64142ca511bc951daf565c1
font_02_sfnt_off00018871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18871 10844 bytes
SHA-256: ff7052b060ade4a911720adbf6bef12d4d8bd32202e969b490d621e24bfdc98b