Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee129659f44e42c8…

MALICIOUS

PDF

66.5 KB Created: 2021-09-13 19:25:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 12e0c666a6dd5f8c292dd0e007ad153e SHA-1: 5a8fff0742244bff3c361016eb8b2c5318514be8 SHA-256: ee129659f44e42c8a4ae9f5df842e06d46ca3dbefcdfd0393a73c0db025eb758
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file containing embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The presence of a link farm pointing to multiple distinct hosts, some of which appear to be compromised CMS upload directories, further indicates a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6093

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://pistant.ru/uplcv?utm_term=how+to+send+animated+text+on+android PDF link annotation
    • http://nokianhakkablue.ru/ckfinder/userfiles/files/rodusekinerafefetokirefuz.pdfIn PDF document text
    • https://gemicilojistik.com/userfiles/upload/file/53878950622.pdfIn PDF document text
    • http://bjsixiang.com/jingkelun/userfiles/files/20210908030427.pdfIn PDF document text
    • http://cathyourhair.nl/js/ckfinder/userfiles/files/39019860207.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b100e74003---zopamojuvula.pdfIn PDF document text
    • http://milkyway-vn.com/upload/files/peredozipidilutadegiwoza.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/xazogitesofepaxemos.pdfIn PDF document text
    • http://www.ramseier-appenzell.ch/elrada/js/ckfinder/userfiles/files/senajesuzekamujava.pdfIn PDF document text
    • https://uzmanwebci.com/calisma2/files/uploads/56304995872.pdfIn PDF document text
    • http://61kidsclub.com/userfiles/file/52339534298.pdfIn PDF document text
    • https://jackinthegymtpe.com/uploads/files/202109022027454134.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/74134299494.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161329a0af3a20---zesesutaz.pdfIn PDF document text
    • http://edeins.com/userfiles/file/38770058205.pdfIn PDF document text
    • http://tpt.taipei/asset/uploads/files/3822998431.pdfIn PDF document text
    • http://elard-group.com/ckfinder/userfiles/files/9009606529.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/gakedaxupefifikelum.pdfIn PDF document text
    • http://architettipassarinmarzotto.com/userfiles/files/99033875253.pdfIn PDF document text
    • http://como.gattinonimondodivacanze.it/themes/userfiles/files/gigibafojukozob.pdfIn PDF document text
    • https://dotcomtravelegypt.com/userfiles/files/sefazanasufonuliwi.pdfIn PDF document text
    • http://xn--80aatg4aaaddkhfhbf3evf.xn--p1ai/ckfinder/userfiles/files/74298143000.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16133ba113394c---guvetazusinovo.pdfIn PDF document text
    • http://sinorarechem.com/upload/files/purofarut.pdfIn PDF document text

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