Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf489633c0c08cd…

MALICIOUS

PDF

46.9 KB Created: 2021-09-19 07:18:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a14194db8aa1b1b86eab932c4acce29e SHA-1: b509ee32d2ac42c9d62583d26af6ecfb778b30c7 SHA-256: baf489633c0c08cd416d81a7e56e90ba60e889ae339d3a2775703c4fc8e84d03
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to initiate malicious actions or redirect the user. The heuristic firings indicate that this PDF acts as a link farm, pointing to multiple compromised websites and disposable hosting domains, likely to host phishing content or further malware. The ClamAV detection and ML classifier strongly suggest malicious intent, consistent with a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7355

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://coretry.ru/uplcv?utm_term=iphone+stuck+on+preparing+iphone+for+restore PDF link annotation
    • http://espacioschillout.es/images/admin/file/pejizi.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/lebosejilujidesuvur.pdfIn PDF document text
    • http://www.lukoilmarine.com/ckfinder/userfiles/files/54461968046.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/f13323dd30104728589d9dc20ad85a83/kifudo.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613f035f88589---57347869228.pdfIn PDF document text
    • http://ain.proximeo.com/ckfinder/userfiles/files/mixerugomidibizipozu.pdfIn PDF document text
    • https://www.borzabadi.com/ckfinder/userfiles/files/94291055375.pdfIn PDF document text
    • http://pol2-simf.ru/userfiles/file/lonisumizefosirez.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/ad96e69c6e5d42bb93dafde199c564e2/19893062437.pdfIn PDF document text
    • http://uklearningnetwork.com/userfiles/file/vikidopa.pdfIn PDF document text
    • https://gameadvisers.com/js/new/fckeditor/userfiles/file/72996061812.pdfIn PDF document text
    • http://trevelsi.ru/ckfinder/userfiles/files/86024768136.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/35126002538.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/tupimibumegadi.pdfIn PDF document text
    • http://xinyaoqiye.com/upload_fck/file/2021-9-17/20210917153436976886.pdfIn PDF document text
    • http://studioboscono.it/userfiles/files/noramexesapo.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613944cad5cff---rodiginujegefunedupizuvif.pdfIn PDF document text
    • https://kokomanis.com/contents/files/7800659413.pdfIn PDF document text
    • http://indago-rovigo.it/userfiles/files/nidowezukifasitaxoxeku.pdfIn PDF document text
    • https://afra24.com/basefile/afra24/files/9809799132.pdfIn PDF document text
    • http://mensagemcrista.com.br/ckfinder/userfiles/files/96030783469.pdfIn PDF document text
    • http://futsalcb.cz/picture/vtextu/file/58595840827.pdfIn PDF document text
    • https://self-storage.sg/images/uploadedimages/file/46372997744.pdfIn PDF document text
    • https://gilboamedia.com/userfiles/file/87718726661.pdfIn PDF document text

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