Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c7b5fb8f99c7b2…

MALICIOUS

PDF

100.2 KB Created: 2021-07-25 03:07:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 646522418e9b5573d89ec8202da1a8c3 SHA-1: be6ebb64ad859df445e95ea58e6e4566dd4f23c3 SHA-256: 60c7b5fb8f99c7b2b12af5f992bf5df5f71a249303a1d231a9898849a1d9a0f2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or are part of a link farm designed to obscure the final destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://crm333.com/documentos/file/matajalepuzabodejaxeduvad.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f518e8457af---86145163305.pdf
    • http://meteosputnik.ru/userfiles/file/77919915264.pdf
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1cd62ebfe---78156271431.pdf
    • https://netpage.info/userfiles/file/zitiravaxim.pdf
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/30024ad933c430c97150466fc19fbaae/29977543977.pdf
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/26532943389.pdf
    • https://zzhqhi.com/d/files/rakewarid.pdf
    • http://chiangmai-clean.com/user_img/files/83393981301.pdf
    • http://kopdesign.nl/userfiles/file/setugib.pdf
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160d1fe0978289---safar.pdf
    • http://nkmate.com/FileData/ckfinder/files/20210718_CDD933F2BC22CB08.pdf
    • https://www.nuyew.academy/wp-content/plugins/super-forms/uploads/php/files/0c9a67e42ebe530ce295439dcda359f2/jeruxa.pdf
    • http://mbcasc.net/imgs/file/tazokavu.pdf
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/b72222b5d5f673d52f53bad786ac196b/xipetapojodofidijadupomu.pdf
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/4e83ffb0470dffa8afffbc1a0e89c23e/43576787495.pdf
    • https://shoppingplanet.ro/ckfinder/userfiles/files/70043609455.pdf
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/22309300867.pdf
    • https://valstybestarnyba.com/upckfinder/files/mipotepo.pdf
    • http://cfacgroupe.com/uploads/FCK_files/file/32713291134.pdf
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bde9f6b39ef---duwazobalo.pdf
    • http://jfhconsultancy.nl/userfiles/files/kajuzoferovidafetoxawa.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e814b3f4b4---kupaseku.pdf
    • http://sunnysideclassof64.com/clients/a/ac/acc4ccb49d7935ca36198347b895393e/File/bewipevavo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=horizon+zero+dawn+walkthrough+revenge+of+the+nora
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001249d.bin
f1ad2a1244a35d2cfa3c63f8b668d00c51aaa2304e2c06d5510f27f43fa5cd0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1249D 10860 bytes
font_01_sfnt_off00013d6f.bin
b87a502179495f61665199c83aaf156899bf32ee4490b35fb103da8602e16cca
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D6F 17396 bytes
font_02_sfnt_off00016ac5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16AC5 16792 bytes