Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b881e982a0a00d3…

MALICIOUS

PDF

53.3 KB Created: 2021-09-03 11:30:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d1253cce8d98d75cf126d17a91e0b0c4 SHA-1: 4da10d83324ca00f24621dd2f210f69a11f5434b SHA-256: 8b881e982a0a00d395b76dc25f6912eb522ee4f9efcab64e169670b1c40745e1
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable domains, likely to lure users to malicious content. No scripts were extracted, but the presence of many external URIs suggests a primary function of redirecting users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6798

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://queure.ru/uplcv?utm_term=prometheus+and+epimetheus+pdf PDF link annotation
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/37304416793.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c756581141c453d66537b31d4f12694e/16982158269.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/6a054nnjp7h3clkhipq3c4ocl4/65806392144.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f5de54f4c2---posoguxuwaratama.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/3218941178.pdfIn PDF document text
    • https://houstoncoinclub.org/FCKeditor/file/52288883432.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/jvkcegd7k7hpn21g1lp2rm7k3v/16767599196.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/8iv873vimvml5n0fq4r3q8g39s/gajasamugorugiliparuwas.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/f74adaa64562717bfad9494b876a6cc5/40379591651.pdfIn PDF document text
    • http://iamsong.vn/uploads/files/38944122626.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7cfe6aff6---gutezag.pdfIn PDF document text
    • http://mis.nrru.ac.th/gradjournal/ckfinder/userfiles/files/47291650925.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/aac2bf423678f8e1dc270080a22416c3/73651773287.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/ccee4a1249324993ae9b73e157b558c3/weropujaposefibekepalabof.pdfIn PDF document text
    • http://binhchuachay.info/Images_upload/files/84347741625.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/96922621953.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a43694644c7---netutikujavib.pdfIn PDF document text
    • http://xn--80aa5alfu.kz/file/67111273440.pdfIn PDF document text
    • http://parkety-patemal.sk/files/file/xuvavupasemumatomekupe.pdfIn PDF document text
    • http://celcg.pl/uploaded/file/14736785510.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/mofibikamemajif.pdfIn PDF document text

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