Malicious PDF — malware analysis report

Static analysis result for SHA-256 576ab63f82fd9f38…

MALICIOUS

PDF

60.9 KB Created: 2021-07-19 02:05:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 27255973886ae533cf86f36a81a203d9 SHA-1: ef22dfe68d2e58fbef310430b4d28fcdcf5485b4 SHA-256: 576ab63f82fd9f38d677ef0db66f89fb1da33de8a4d579b34b094f7548f70967
154 Risk Score

Malware Insights

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

The PDF file contains numerous links to other PDF files hosted on compromised websites, indicating a link farm or SEO poisoning attack. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The document body is unreadable, but the heuristics and URLs strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5046

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 http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/c5mrblkfomuflag4fi00kb4338/vifixogejive.pdf In PDF document text
    • https://unserbiokorb.ch/userfiles/file/jawagogodajubinobepipow.pdfIn PDF document text
    • http://hanarotalk.com/userfiles/file///febusabapi.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/708b484455791292fc622d57eb2440ab/senebaxituzolirumop.pdfIn PDF document text
    • http://0vote.com/ckfinder/files/tagawu.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b515d0ba9---41619355386.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/pixumesevu.pdfIn PDF document text
    • http://7seapharmtech.com/Uploadfiles/files/74304314023.pdfIn PDF document text
    • http://lamelove-zakryti.cz/userfiles/file/75987538558.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16072437eab116---feniwawabovotikes.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/fnqvbmhsn21dltah835tlpit63/fuwavipipetizaritomevojas.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/65222325049.pdfIn PDF document text
    • http://kunbot.com/upload/files/43752916845.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e64ac727d---79616727979.pdfIn PDF document text
    • http://limoride.net/gallery/file/suzaferifenukote.pdfIn PDF document text
    • https://biocoop.legreniervert.fr/ckfinder/userfiles/files/jatuxovujenosema.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/63759613032.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/ronajomazovataluf.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7b91a9300---9746207805.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16073dafa638f2---dasefelinatajaxiver.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///todimowosutotidepa.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/68973407515.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5eb9bd2a8---79241910183.pdfIn PDF document text
    • http://schokoladenfontaene.de/idata/mojazigijerovafuwapowe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=seroquel+common+side+effectsPDF link annotation

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