Malicious PDF — malware analysis report

Static analysis result for SHA-256 bda4a95ea4e51ad0…

MALICIOUS

PDF

122.1 KB Created: 2021-07-07 01:11:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 042085538c4435caa3d937774e7252e6 SHA-1: 8c62f36acf878fe6c6ab44df19634eab2039ebb9 SHA-256: bda4a95ea4e51ad03edba09c7648895be8504231f06897ea25b8cecd86eaf1a3
144 Risk Score

Malware Insights

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

The file exhibits characteristics of a malicious PDF, including malformed streams and a link farm pointing to compromised CMS uploads. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The primary attack pattern involves redirecting users through a series of links, likely to a phishing site or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4576

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
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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
  • 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.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/28b1e8b2d05a5dcce60f4024acda1076/60374991689.pdf In PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/9efd4f2fcab19d2eac278959b7fab826/xebexemufikojixasemup.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8411c724a8---38215117645.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///83681517863.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/6b5eff58b82d8f8e52faed1bf9747e87/72491245491.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/snkh5u667rkvrg7idjke98i600/kefabaji.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbdf8cef8f0---86171442051.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d36bf7f0d2d---41838829608.pdfIn PDF document text
    • https://kompaspt1.com/contents//files/88064290178.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d40ebaed385---tixaxeromizigatugeluke.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088a635ab879---wonurug.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/gapf5q334kudrr0738l0jfsj23/71907555767.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/kfqoc3jjrjkajf7pit5i841u7k/jurujezipaxotogemiruga.pdfIn PDF document text
    • http://deforma.it/userfiles/files/55545617817.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/a0cc37d3a96768aa7ee197a44d3aa6a4/jaremagozu.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa23626f52e---jojogusutowupugusiside.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/dadanesotebise.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160cad8b8afc24---lepij.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/duwamab.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160890b33a1356---narubilamo.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/122460813ca48ae17073c1c4f1b582b5/65651107362.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7e3da538b---55171596281.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4606663b0---46686341909.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/308a9b9c560694954df9e9ac1df5d661/xosofeposaduvelazixape.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=environmental+science+questions+and+answers+in+bengaliPDF link annotation