Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1013608df008fdd…

MALICIOUS

PDF

55.8 KB Created: 2021-06-10 18:35:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: c43279f843f13eb8118c2245f3ffb118 SHA-1: 71cf472c3aeca0cfda74a95d2c70eae393f427da SHA-256: a1013608df008fdd0d8d0edba46bbe87406d9d08d0a463441e72f1853651ce07
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution campaign. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier further indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'Introducci 3n a la biolog 3a celular alberts pdf', likely to trick users into clicking the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7497

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://irlanc.ru/uplcv?utm_term=introducci%25C3%25B3n+a+la+biolog%25C3%25ADa+celular+alberts+pdf PDF link annotation
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa6cb64a8e---61714754521.pdfIn PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/e67fdb074dcf9c503c515d28e7a2292e/24367191951.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3307b0c6ad---rugupixiposozitux.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/rirefoxiranodapikuxoz.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160869e2ae7662---46865610827.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16084f07c9cbbf---vomosezoziwozebuberopatuk.pdfIn PDF document text
    • http://bigandtallking.com/userfiles/file/51682171227.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a0eb5757b48---74209852969.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16085730c8eb72---86466414561.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/c69bb60112da449d4b2bd0b165e780cc/97940833776.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/046aa9bae5f8b954184389cfdba0cea6/xinopapeliwegidupaw.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/ed239d609562043698b3edb2bd8b67ae/22854528047.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/kiwopajubujusetimarokorub.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a10e63ca2---doberitomasipomol.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/7823a91fdc952df7e0f9309afa2e9bc3/3056369829.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098dfddebac3---85404225343.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/1b41c9133fe6a7ddaa674fb88d5f78a7/sixifaxewupu.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c42b1b3376---sitarup.pdfIn PDF document text

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