Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d9d5fb6e5d54ec9…

MALICIOUS

PDF

77.9 KB Created: 2021-09-09 12:20:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 52a7052478e42baded7fcfee57e56b99 SHA-1: 45110ad00b1c4fa0598c8a0b80c77ed084f37851 SHA-256: 9d9d5fb6e5d54ec99478ac5419c7d40f78d0be5579bc685ae0fd5f2b5e1abe5e
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a PDF containing a link farm, with multiple URLs pointing to various websites, some of which are flagged as compromised or disposable. The ClamAV detection indicates it is a Pdf.Phishing.Trojan, suggesting a phishing or malware distribution intent. Although no scripts were directly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

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 http://bamor.org/userfiles/file/dipabomizofiwozawubogaran.pdf In PDF document text
    • http://ekhoron21.mn/uploads/files/20269606664.pdfIn PDF document text
    • http://rajasthanmetals.com/userfiles/file/77293673928.pdfIn PDF document text
    • http://patroha.hu/file/44061935141.pdfIn PDF document text
    • https://khyatiinfotech.biz/ckfinder/userfiles/files/surekibonididozugipago.pdfIn PDF document text
    • https://chennothinterios.com/uploads/file/debuxofuguwipol.pdfIn PDF document text
    • http://bancasemecanino.com/userfiles/files/74214241294.pdfIn PDF document text
    • https://istanajpdua.com/contents/files/zabipufapozum.pdfIn PDF document text
    • http://factorycontrolprojects.com/userfiles/file/lunexejev.pdfIn PDF document text
    • https://claudiodituri.it/uploads/sijemadowinigaw.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents/files/89360992342.pdfIn PDF document text
    • http://www.tecs4.com/intranet/ckfinder/userfiles/files/97122878077.pdfIn PDF document text
    • https://bartonsteel.com/tony/barton/ckfinder/userfiles/files/zakenudodoj.pdfIn PDF document text
    • http://anm-av.de/uploads/files/kekinijujekifi.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/161309dd71d40e---gujabejuxazizik.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138ab5db404e---niladatav.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613576abd635f---bemelumofabisew.pdfIn PDF document text
    • http://acutecardio.ru/sadm_files/jufemaporalotal.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613246186066f---mekopafomuveg.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16139271696351---mozebesezepavexukamije.pdfIn PDF document text
    • http://armanetti.com/images/vagesutivezatulefer.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/f8ba1f075a270d8bbed38da0f391487c/37433290501.pdfIn PDF document text
    • http://tourgrodno.by/images/content/file/lonebedevapom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=epic+cricket+apk+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D2 18148 bytes
SHA-256: 2b211f8e0b02ec26bc3dd99862c0407e5174619e4f65469f68e94b6a30812c92
font_01_sfnt_off0001122c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1122C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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