Malicious PDF — malware analysis report

Static analysis result for SHA-256 1698baca1e4f37b8…

MALICIOUS

PDF

74.9 KB Created: 2021-05-18 11:40:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4bfa63cff66bb23dc664f638bfd25140 SHA-1: 38bf5fd28e5d47fddafd41ec164bf19b777523d3 SHA-256: 1698baca1e4f37b87197557166ae54461c182d10ac72fd8caa045ec98a237254
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8117

Heuristics 5

  • 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.
  • 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://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160a3179613a2e---13320229171.pdf
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/rsvpkro4fkblgdh0lskfibrjh4/jisobiforerugukikitikiver.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160963ca0e552b---xizakajazuz.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a35dbc644d---dedanopumu.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16099c7d10ace2---kutikumibiwedejeg.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16071b2f6de0b3---bafin.pdf
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/735c3c6c9571fa00d1a160ab6a2a2e1f/49761298634.pdf
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/3etvidj5hfs6rcqdqm9e307kr0/32419346561.pdf
    • https://allcreaturesinc.com/files/files/93937015949.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e020cd55fd---tipakafafaxu.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16081bb0cd7dbb---jatobisawotezuwiz.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16072a46212751---baxudesedenotinumuwig.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bfc4ea87bd---18647876950.pdf
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/73fc4c2fb95864f6f9a5a687d0ee03e8/31111827854.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086e24065e27---xeteka.pdf
    • https://kogan-photo.ru/wp-content/plugins/super-forms/uploads/php/files/f6d54c1999bafe41dc6ed82deed57698/lexowarad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=laser+level+pro+3+manual
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efb9.bin
56c57a85119805422ac96fe72672487d5324233e68a0eb2c1538995272181654		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB9 5132 bytes
font_01_sfnt_off00010121.bin
a3ec24fda530425875ca2cf608ccc72667db5cdb61df533061f07e19290e5885		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10121 11668 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.