Malicious PDF — malware analysis report

Static analysis result for SHA-256 e802aef11142487f…

MALICIOUS

PDF

62.3 KB Created: 2021-06-20 01:24:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: fcad31345a9b373a3e847792ed0fb1c6 SHA-1: 8cfb5d3cc97c6338ab2b2533b1c956e4f3c708da SHA-256: e802aef11142487fbb8839302c81fc60723dd87246b097430904a973deb72e60
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or malware distribution lure. The document contains numerous embedded URLs pointing to compromised WordPress sites and other domains, suggesting it functions as a link farm to redirect users to malicious content. The presence of these links and the overall structure strongly indicate an attempt to exploit users through deceptive means.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8081

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://wastran.ru/uplcv?utm_term=probinsyano+november+20+2020 PDF link annotation
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/d2b8ebc25d41e1e3757a7fc6e5b9ccd8/wusutujibegava.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/da4189de9931dc85b0426e372ce84c6e/gesolebevire.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160962db58c288---23853642752.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f246640af---dugizujarosaxamudadujebok.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751611c61ab---34925894338.pdfIn PDF document text
    • http://lso-msm.fr/userfiles/file/jobeludatet.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/20186815637.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/subekiwa.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210606154331987.pdfIn PDF document text
    • https://afayl.com/userfiles/file/gefosikunojetigu.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/zomuzuxega.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607750a007781---36028469960.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/13132491334.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/09dsom6891t4h7drm60k6dg4n6/53850560961.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/544a1de21a4becaa639cf57cc751f29b/42116529132.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC986 5084 bytes
SHA-256: 5715ae4dd3b402b0715688d3de08dc712ca8be1bec2f0468cb1be5d413317ef9
font_01_sfnt_off0000daa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA8 10332 bytes
SHA-256: 3b30c7ce6c99174964403dcc2d5876706981c9d1b313dcee137f88abe81fca11

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