Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c18b9e72fc6282a…

MALICIOUS

PDF

69.0 KB Created: 2021-09-26 00:27:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 240a34ad79eac3088d503d4d76415781 SHA-1: 529d4cfbee610ca52f9bee2297bc3329dce8b4eb SHA-256: 5c18b9e72fc6282a5daa0205ebbe685c93edf1636b76cc4c95d7e940f0a80ed5
176 Risk Score

Malware Insights

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

This PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains a link farm pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The document body is heavily obfuscated, preventing a clear understanding of its direct intent, but the overall structure and heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613a4f2bc4523---tesipigaxesakatejewix.pdf In PDF document text
    • http://jdjcnc.com/upfolder/e/files/20210913200456.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614d2539dc0fb---jituwiwof.pdfIn PDF document text
    • https://shevian.com/images/file/gakod.pdfIn PDF document text
    • http://fairfresh.net/assets/admin/ckeditorimage/files/9398493548.pdfIn PDF document text
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/29300136739.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16137030d9f3f3---70791682698.pdfIn PDF document text
    • https://cbdc.co/uploads/ckfinder/userfiles/files/jefotas.pdfIn PDF document text
    • http://kmkonsult.cz/userfiles/file/14192283317.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614cf24354671---21080540341.pdfIn PDF document text
    • https://menokatea.in/ckfinder/userfiles/files/24799298710.pdfIn PDF document text
    • http://lesen-und-schenken.de/userfiles/files/80730627244.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b209259016---83805945691.pdfIn PDF document text
    • http://tourbusan.net/FileData/ckfinder/files/20210924_B2C82D29A94DC01D.pdfIn PDF document text
    • https://dlt-nkp.com/fileupload/file/77776359149.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/wuvijofemimidivitujip.pdfIn PDF document text
    • http://qualityspices.in/ckuploads/files/31405242464.pdfIn PDF document text
    • https://yar-net.ru/userfiles/file/mudoduseperumix.pdfIn PDF document text
    • http://thibidi.vinadesign.info/uploads/images/files/lakurozodidugolukuni.pdfIn PDF document text
    • https://sklepbonus.eu/userfiles/file/musofan.pdfIn PDF document text
    • http://megamento.com/_UploadFile/Images/file/83296415706.pdfIn PDF document text
    • http://stainless-faucet.com/uploads/htmlupload/files/dovapedud.pdfIn PDF document text
    • https://synersys.fr/contenu/file/denutesadifitadaveravem.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/161399110a81ca---74723011152.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=cars+fast+as+lightning+game+downloadPDF 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_off0000b171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB171 10920 bytes
SHA-256: 8bd3c1b5022b1c8a2bca08cb6422585f1bfc7789f2dafc2b5b0dabd6b42e824a
font_01_sfnt_off0000ca64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE276 14528 bytes
SHA-256: 23278cab833885c4a0e5bc802578e6fd175432eb717706b4884f2ef94354f095

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