Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ab857a80709dae5…

MALICIOUS

PDF

72.0 KB Created: 2021-08-25 09:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8b138d902c5d3094ea6da129149d8bea SHA-1: 31a19f6a71c4587977922e7fbd5667fd07891757 SHA-256: 3ab857a80709dae55b396c06acfdc041ff56598df89a094db060798e6c6c43a8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8835

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://allytemp.ru/uplcv?utm_term=girl%27s+day+i+miss+you PDF link annotation
    • http://slsnn.ru/content/files/17431152486.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/24646176516.pdfIn PDF document text
    • http://pasted-radio.de/web/files/vowufogukivipa.pdfIn PDF document text
    • http://industrialdevices.in/uploads/lenefojujudokuma.pdfIn PDF document text
    • https://berettyotv.hu/userfiles/files/70961389803.pdfIn PDF document text
    • http://boxethai38.com/upload/file/76482388996.pdfIn PDF document text
    • https://dubaimotorcycletours.com/uploaded_images/files/54557746303.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1611a71564db5b---11174701921.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084318d932d1---33639430471.pdfIn PDF document text
    • https://filetorme.com/upload/files/7683474309.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16099cd29b2b58---47882056798.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/5af2um9f859repd677maj66tec/lutabalanuga.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/44db0710c256a806ab1a221fa831eca6/dititobegugukora.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe5c206815---70678634640.pdfIn PDF document text
    • http://presssimayeshahr.ir/pic/file/xirajuxovuwo.pdfIn PDF document text
    • http://saintthomasmonrovia.org/clients/a/a7/a774d5b45fc75aba9c6fcf07501e1e58/File/92926905209.pdfIn PDF document text
    • http://kolaykanal.com/userfiles/files/19578741665.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab64c2538c9---nidurojiveralali.pdfIn PDF document text
    • https://areopag.ru/sites/default/files/uploads/12348179541.pdfIn PDF document text
    • http://nemalipics.com/lujefuvelezuwuf.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/cm4q7v99l06to7tgntdlgtq7e0/winugopujavizufa.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/23045650379.pdfIn PDF document text
    • http://bethanybaptistcolumbus.org/clients/75549/File/89912291363.pdfIn PDF document text
    • http://exito-opakowania.pl/userfiles/file/91338225172.pdfIn PDF document text
    • https://datatech-int.com/userfiles/file/55266149100.pdfIn PDF document text
    • https://soccerauquebec.com/userfiles/file/8236780818.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16120a13d7afe5---88490489339.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B9 17288 bytes
SHA-256: af81f69a4b4626d3f6e7b24928176f6c84d4d1d2d234b57c4f1f308ac1a4d233

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