Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd0e3a43490d28ca…

MALICIOUS

PDF

55.8 KB Created: 2021-10-01 12:35:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 8186b8a42fe926afd404e26f7c2624e3 SHA-1: 16ca73c7a9107b6a0e7b1129deb82ce0bfd5c230 SHA-256: fd0e3a43490d28caa8dd435fc148e23cb5d5cea5db3046930979e9be31513a9f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that point to compromised WordPress sites and other disposable hosting, suggesting it functions as a link farm. The primary goal appears to be directing users to external malicious sites, likely for phishing or to download further malware, as indicated by the 'link farm' and 'phishing' heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8534

Heuristics 5

  • 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
  • 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://catamma.ru/uplcv?utm_term=youtube+apk+dl PDF link annotation
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/e38cbf33b6add764a44aec1c76360833/selepimiza.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/53040034258.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/ronufolivoputit.pdfIn PDF document text
    • http://www.rupankar.com/fckimages/file/16408829213.pdfIn PDF document text
    • https://rafaela-motores.com/userfiles/file/89760275706.pdfIn PDF document text
    • https://unitedfightalliance.com/ckfinder/userfiles/files/pavegodamowaterixesi.pdfIn PDF document text
    • https://adikketiga.com/contents/files/88440659943.pdfIn PDF document text
    • https://phuketwebstudio.com/ckfinder/userfiles/files/demekifafejaxazupavaka.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/56727175646.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/5627924268.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16156471755acf---3679701875.pdfIn PDF document text
    • http://huiking.cn/uploads/file/191345595399.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/47805628494.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///legof.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132b0cf16eec---wosofesuwelanowufubepaxo.pdfIn PDF document text
    • http://baharev76.ru/userfiles/file/54486362560.pdfIn PDF document text
    • https://almavilag.hu/files/files/lojujotiwexemosimabo.pdfIn PDF document text
    • https://taitaosuckhoe.com/uploads/files/16222560816.pdfIn PDF document text
    • https://kompaspt2.com/contents/files/korirebutidop.pdfIn PDF document text
    • http://eska-lift.ru/userfiles/file/segowexid.pdfIn PDF document text
    • http://gelateriacool.it/userfiles/files/61787135122.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142901a0cbec---94294590738.pdfIn PDF document text
    • http://runwellconsulting.com/file/file/dedejosob.pdfIn PDF document text
    • http://amongelite.com/ci/userfiles/files/mejununalajixiratusadi.pdfIn PDF document text
    • 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_off0000b3cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3CC 16764 bytes
SHA-256: 72a17e3592c3d4141a9c0d06e2916d150ef59fd8bf208c7c765022fcf4d21ba8

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