Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d28495f50e548f7…

MALICIOUS

PDF

54.6 KB Created: 2021-09-27 02:02:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: a92ebd1035d7919fb17b4f14146d5cf8 SHA-1: c3789cb3035ba510ea4cf6fa31aab72a64cf471e SHA-256: 5d28495f50e548f791682d52d94d9c1c7b5065f795df6c5ded93b21c84d76c1d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links, many of which point to websites hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8265

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 https://cncunse.com/d/files/relujora.pdf In PDF document text
    • https://sharmtocairo.com/userfiles/files/71958818426.pdfIn PDF document text
    • http://elskup.pl/images/assets/file/99076929291.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/2513a9dec44bf58fee88bdbe05f0ded3/13006597998.pdfIn PDF document text
    • http://hqshop24.com/userfiles/file/86326843155.pdfIn PDF document text
    • https://esvigo.com/upload/files/zeduxutefawabidu.pdfIn PDF document text
    • http://customize.fr/fckeditor/editor/filemanager/connectors/php/img/Editor/file/sefujepijipaxota.pdfIn PDF document text
    • https://hanedantoptan.com/upload/files/67127512852.pdfIn PDF document text
    • https://5uempat.com/contents/files/lodajolixejed.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/e6eddffe3ef5cf0d14bb18eef1102ee4/58099093118.pdfIn PDF document text
    • http://topmebli.com/content/xuploadimages/file/59530273085.pdfIn PDF document text
    • http://bettaletroom.com/file_media/file_image/file/kulewakabosebejajakerizex.pdfIn PDF document text
    • http://frangarcia.eu/upload/file/fuseradatekonen.pdfIn PDF document text
    • http://michardardillier.com/ckfinder/userfiles/files/17382268509.pdfIn PDF document text
    • http://packagingandfoodmachinary.com/userfiles/file/7867508315.pdfIn PDF document text
    • http://vinabomi.com/uploads/userfiles/file/11590284802.pdfIn PDF document text
    • http://midospa.com/upload/files/resulutoj.pdfIn PDF document text
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/mawegegil.pdfIn PDF document text
    • https://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/pagiveli.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16150f5a21d049---midetixi.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/55608026293.pdfIn PDF document text
    • http://morakothotel.com/file_media/file_image/file/51554669319.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/161307dd241b07---84576808686.pdfIn PDF document text
    • http://metamorfozyayincilik.com/userfiles/file/kadob.pdfIn PDF document text
    • http://ahzgbh.news-read.com/upload/files/bepowej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=best+free+countdown+widget+iphonePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000affa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFFA 15940 bytes
SHA-256: e6ce1e7c44fd72d94be3d1b219c3d5e820615ec8cb37e1b742cf6e5147e08a57

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