Malicious PDF — malware analysis report

Static analysis result for SHA-256 17baec2bd5be12b3…

MALICIOUS

PDF

62.2 KB Created: 2021-09-04 15:45:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5bbdfa81c7176fbc3bfbdab88481e18d SHA-1: 61a4318bde38ace9a07cd38dc4e23e9671c222dd SHA-256: 17baec2bd5be12b3b4b498360e41eb8784359323cf01b1b2f1cf524113e56060
162 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities to execute malicious code. The numerous external URLs, many hosted on compromised CMS upload directories, suggest a phishing or credential harvesting campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the exploitation of a client vulnerability to redirect the user to one of the listed phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9043

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 https://crysiq.ru/uplcv?utm_term=mp+crime+victim+compensation+scheme+2015+pdf PDF link annotation
    • https://nusbetaja2.com/contents//files/47644159385.pdfIn PDF document text
    • https://marbellamohali.com/wp-content/plugins/super-forms/uploads/php/files/57bd6cf5344eab21611abdf4aa0bef7a/zujubelor.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/10282227235.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c905aca1cf0---37354775624.pdfIn PDF document text
    • http://infinity-pro.ru/userfiles/file/21182408934.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/khjfsg38e544vuine41l5dra0b/50671907404.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161316a6d0aac8---71187929667.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/5d4ae218ef6f3fcf7a6f53a0a6438af1/wuwizesazog.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/81437764267.pdfIn PDF document text
    • https://agape4u.org/userfiles/file/vonabulojujupesebis.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/7t2arh99p2ftq2hqt322o1c847/lorewa.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c19d32639e9---23322465206.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075da6a42e59---29591686741.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/a3a53ccce45ada2bbbbe73011569d8db/retopipikujowokir.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/povogivuseriwatatel.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/burutibirikogeg.pdfIn PDF document text
    • https://www.koreayokogawa.com/ckfinder/userfiles/files/62617160320.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/4979d8eebe645e1d50bbb4f3924a6ec2/gefokonibujufeziriva.pdfIn PDF document text
    • http://djarkitek.com/temp/vinney/HTML/userfiles/file/bexajagida.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/f9bdaca67ffd5f2e0a273cec44632c3b/58466815952.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/fivubosaboden.pdfIn PDF document text
    • http://cungcapluonech.com/upload/files/3237175596.pdfIn PDF document text
    • http://zs-g.jp/app/webroot/js/ckfinder/userfiles/files/zetuvotefifuzawewekiv.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE151 11328 bytes
SHA-256: bfa1b3769ba925ed1c1a526454754868e1ec53c1f3384fbdbbc5d908acc7a077