Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1ecce5fa8f36895…

MALICIOUS

PDF

62.4 KB Created: 2021-09-25 11:47:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 1e84c46db7147ce9dbe747119fb0173b SHA-1: 5ccc10bc28cb0fde4fc679ac67542e023f66312c SHA-256: c1ecce5fa8f368957efb1fbba3a24b982c6852b7a58a3ece3cd9e038f2a6ed8f
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites or disposable hosting, indicative of a link farm used for phishing or malware distribution. ClamAV detection and ML classification further support its malicious nature. The embedded JavaScript likely facilitates the redirection or exploitation process.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5428

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 http://www.sanjuktabanerjee.com/fckimages/file/43243692094.pdf In PDF document text
    • https://sjamsul-hidajat.id/ck_uploads/uploads/files/nawelinit.pdfIn PDF document text
    • https://geniodelweb.com/file/popoloronolufebetowok.pdfIn PDF document text
    • https://careersourcechipola.com/files/public/91652976250.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/sabozetofaretoxit.pdfIn PDF document text
    • http://abwwilson.com/uploads/files/gajuvukijir.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161446cc70aad7---7270332684.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/374ceb05c8a47d82bf6fd340ce8050ba/jezuja.pdfIn PDF document text
    • https://chptravel.ir/data/file/doxazixizagadere.pdfIn PDF document text
    • http://cobweb.janci.net/upload/files/15688957917.pdfIn PDF document text
    • https://www.comperat-89.fr/ckfinder/userfiles/files/lubologumedusabawuzejolu.pdfIn PDF document text
    • https://kimansion.com/uploads/file/fulavizovilotorow.pdfIn PDF document text
    • http://japan-railpass.info/images/blog/file/kuvasumapizowulebifonaf.pdfIn PDF document text
    • http://geerhannutpourreussir.be/docs/upload/files/9786406462.pdfIn PDF document text
    • http://peach2560.xyz/js/ckfinder/userfiles/files/fapebalevupipepix.pdfIn PDF document text
    • https://www.la-providence-ehpad.fr/ckfinder/userfiles/files/69689752905.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/bebilosawofokutej.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/61497dbb8e3db2f89f2c0fa4bb620697/40345821714.pdfIn PDF document text
    • https://mastirz.com/userfiles/files/875274701.pdfIn PDF document text
    • https://mygrind.ie/userfiles/file/tajuvubup.pdfIn PDF document text
    • https://graveyards-fuj.ae/userfiles/files/86841146272.pdfIn PDF document text
    • http://medizator.ru/ckfinder/userfiles/files/18755273778.pdfIn PDF document text
    • http://digjamaica.com/app/webroot/files/kumewobimubakuwigolaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=pes+2017+jogress+isoPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2E5 10348 bytes
SHA-256: 815e0dc8a425767898845ff38fc89174ac4e7769c0fc31243a30b939f521b888
font_01_sfnt_off0000ca79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA79 15848 bytes
SHA-256: 00d757eefdcc78dd2524c80ee13341d506d1c721d781cace7130e2e28bd90a74

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