Malicious PDF — malware analysis report

Static analysis result for SHA-256 93758a0634875fcf…

MALICIOUS

PDF

74.9 KB Created: 2021-07-02 19:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8d9926ee8812ef7ed027c26ec980ed5b SHA-1: 6089f5fd763efa3cb896e25f470501640b456785 SHA-256: 93758a0634875fcf0fd64a8b8f7938b1875370664bf77c10583f78e755c6c946
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, suggesting an attempt to host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with a phishing lure designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 5

  • 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.
  • 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://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/e175p2b7180tqb8nddq0nbndbs/joweduxuviluruw.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607b75aec7396---tetate.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607ade2602573---jaxudedajinolu.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095917af34a3---bimeselonuzewe.pdf
    • http://thetownsendfamily.net/clients/a/ab/ab79602242cca8f930cd52af13df1d51/File/96519693148.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/be586806c8f63fddd193836e8754cc67/xupemodamomolerer.pdf
    • http://sodrex.pl/userfiles/file/93594053778.pdf
    • http://anthonyvienna.com/sites/default/files/file/fagefebaxutonozeve.pdf
    • http://viprealestatebrokers.com/userfiles/files/24791467387.pdf
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/2cuj6pv61pgddlo43eoqhm2ct3/61931880636.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a61ec19e034---61826516261.pdf
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/9aa618e3cf36781cf5ee10c0c4911a9c/jetitunawigo.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/0b7de9c3b2f76b4c4f8ccfba8d728675/40832498171.pdf
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/3dac62dda00e0c48bfade862fa01d5b3/35163426518.pdf
    • https://csn-alliance.com/data/files/losuwalifanafupuje.pdf
    • http://petersonspann.com/clients/3/32/32c4b2f41fa698b5b938e848169c8dcb/File/xunikajobitiwimiwom.pdf
    • http://automotiveenergy.cz/userfiles/file/59801971521.pdf
    • http://medicapoland.pl/uploaded/file/55795770392.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/sn747b4ipkngo9eiei16q2acvl/14539259986.pdf
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/2lg3tp9fcs3n5sug782k8oeme6/99341384156.pdf
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/3dd8fc71b98be13d3398498a5674dd9f/71564311743.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/l0qpl3sd9933lenoq9k9brjmsm/gabekajofixipuzaduxu.pdf
    • http://oreade-breche.fr/userfiles/file/33173012320.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=i+let+you+drift+away+my+love+where+are+you
    • 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_off0000c02d.bin
d88265ca1f0dffc893f6343e2de90a5a32fc9def43447c76bd6547449b917b5b
pdf-font-stream PDF embedded font (sfnt) at offset 0xC02D 10664 bytes
font_01_sfnt_off0000d8a4.bin
a8880b92e8acb3bf285fbdc9b998bd6e2b6a4c20ef53c628230362009f4bd403
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A4 17956 bytes
font_02_sfnt_off0001061f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1061F 16792 bytes