Malicious PDF — malware analysis report

Static analysis result for SHA-256 87374172704ec460…

MALICIOUS

PDF

54.6 KB Created: 2021-09-16 03:38:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 61effa1e58160303685fc2665f0ba4da SHA-1: 2492101bd3877038f41558930b2d19e99076fd5c SHA-256: 87374172704ec460bbf917aa9ff0143e0eec72dc12f26a7ea30b6916eaeb74f9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of a 'utm_term=outlook+login+android' parameter in one URL suggests a potential phishing lure related to account credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6436

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://hv2barrier.com/application/third_party/ckfinder/userfiles/files/tezilobimuwaz.pdf In PDF document text
    • http://giasuthanhdat.vn/Images_upload/files/52340702747.pdfIn PDF document text
    • https://rinducm1.com/contents/files/mawasenufotebi.pdfIn PDF document text
    • http://fukaofoods.tw/uploads/files/202109112011191358.pdfIn PDF document text
    • http://topnotchimports.com/ckfinder/userfiles/files/jijaledaxud.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16135af9ba9da5---15104673817.pdfIn PDF document text
    • http://iswii.net/ckfinder/userfiles/files/50336648036.pdfIn PDF document text
    • http://studiotecnicoprato.eu/userfiles/files/kukubirovem.pdfIn PDF document text
    • http://osstemcardiotec.com/files/fckeditor/file/1653187643612f320790bf4.pdfIn PDF document text
    • http://americasbestmanassas.com/uploads/files/19897265142.pdfIn PDF document text
    • http://dennehylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fivaxosujagigekupa.pdfIn PDF document text
    • http://rideabikenews.com/user_img/files/288546306.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/00bcad1f08cd937d984c0e04da3aa21a/59966681999.pdfIn PDF document text
    • http://dealershop.es/userfiles/file/80201524936.pdfIn PDF document text
    • http://fornacedelia.it/userfiles/files/37377176648.pdfIn PDF document text
    • http://kqcme.yiaiwang.com.cn/upload/files/paked.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16141b31cd0f4b---kexakimavowexurukadig.pdfIn PDF document text
    • http://didongsinhvien.com/upload/files/mixabugevomefun.pdfIn PDF document text
    • http://around-sicily.net/userfiles/file/depeb.pdfIn PDF document text
    • https://gcr.goldcrownresort.com/magazine_files/files/rizanumime.pdfIn PDF document text
    • http://thepokeluau.com/uploads/files/fudibivenumupab.pdfIn PDF document text
    • https://youkuvpn.com/upload/files/82709034287.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161369cc5ee104---xonuvijivamif.pdfIn PDF document text
    • http://artio.pl/files/files/64329254102.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16130653f4d3a0---rajimosigulapafivusiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=outlook+login+androidPDF link annotation

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