Malicious PDF — malware analysis report

Static analysis result for SHA-256 525fefe70c127f29…

MALICIOUS

PDF

93.6 KB Created: 2021-07-21 17:00:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 0ecd4b447b0d15ea20645ed8ee7cc2a2 SHA-1: ec3b27838a64b61aef71997e408ad9db0a73daa1 SHA-256: 525fefe70c127f29e25a0eba8c3f506366d83a2811d7d6479c4dccbbb2ae5237
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, many of which point to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The primary function appears to be acting as a link farm to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://rotang.net/userfiles/file/jizemobizu.pdf In PDF document text
    • http://ajtoablakcentrum.com/_user/file/wivedule.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/xamobepadubidel.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/4a2f776e8d5aad31af411e9cd6a3c672/zakageraben.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9bfb997704---kasolafopanedalanenuvagam.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d01f6e048---18226647347.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160e268482850b---xudarabunojukufese.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/48829945204.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/7debb8c83eb3cf916f2d66508c2174e6/zafipigizozoxiz.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/6cn01gm2436ilmd1hitpes2s5g/98050215565.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/d6b152f59469f5759c15451155372a51/79459745607.pdfIn PDF document text
    • http://www.buildingmalawi.com/images/uploaded/documents/13833137091.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/14900784166.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/5797130644.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f2b26de70---poxuxupiruvirazatalo.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/nekenerava.pdfIn PDF document text
    • https://agermag.ro/mm/file/vogaraligurekulel.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c4848831015---78808807705.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/wugobepasiginut.pdfIn PDF document text
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/63464303619.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/4go137hmeiqubg7nivoltrhqq4/40688026841.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/slhiesn1t4gc7s03punat1h2vf/nepisageleg.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/97429306380.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=product+in+4ps+of+marketingPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BA 11188 bytes
SHA-256: a79a0676611dcc96a4ef945fdb9ff51c1a1b1ab56d7b0315522754975fa14030
font_01_sfnt_off000121be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121BE 17384 bytes
SHA-256: df79d176183b88d36d8121a5e2ca4b3d4a18f9cae7d8c5a8734855c73190acb8
font_02_sfnt_off00014f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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