Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a02d70154e6f030…

MALICIOUS

PDF

66.5 KB Created: 2021-08-20 18:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 27f55c9dcf6f099646f08dd36827ba8c SHA-1: 08b038c96171e5044cec4b5dea7e651f0fab839b SHA-256: 5a02d70154e6f0301520b083fe11d7d1ed209d2f52d34f4ca77b4a5b6c92651d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs and the PDF structure strongly suggest it is used as a delivery mechanism for malicious content, likely involving JavaScript execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8864

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 https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d025274beaa---waxaxabitifopu.pdf In PDF document text
    • http://jkohut.pl/file/19736131905.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095f92da2571---gisonoxukupuso.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/98787145669.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16081263964d0f---kirepamezozakigezofokab.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/8c57fb2148888fb0929f58ff6a2a0421/rotaxamotepi.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160df344b091c1---sowivaditobuva.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c670ed0c3e---72830341288.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/m80608sjmhv9443rsovhebdcj0/vekokufibidexaloxojima.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/zidofutefokuxaxekenapavum.pdfIn PDF document text
    • https://nepalipublisher.com/ckfinder/userfiles/files/vikidudorelugodamas.pdfIn PDF document text
    • https://www.clinicaepilepsia.cl/ckfinder/userfiles/files/27614627979.pdfIn PDF document text
    • http://dochoiotovn.com/uploads/userfiles/file/sonuxebodanova.pdfIn PDF document text
    • http://dralituncer.com/userfiles/file/82427242229.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/japibezijutadegakinadu.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/2104553554.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/28245cd11a5a1aa20bda3ea97fafc2b3/40306524912.pdfIn PDF document text
    • https://honghow.com/ckfinder/userfiles/files/sogagajidodigosepejagug.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/32729232492.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/ad130d5b41be1f893f3f0ba11bf8dfa6/nadakivobulelafupego.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/11954529490.pdfIn PDF document text
    • http://thietbixanh.net/uploads/files/mojagi.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/360d81bfd0a758ade6004b4797d81ed6/wobulodelokazid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=what+problems+does+jem+face+in+to+kill+a+mockingbirdPDF link annotation

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