Malicious PDF — malware analysis report

Static analysis result for SHA-256 952acc329714e447…

MALICIOUS

PDF

62.6 KB Created: 2021-09-17 10:52:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f460a79f6a5819951cb9a68850fe5419 SHA-1: 81c4b6d4b804bd944422a30de0077dbbfb16af05 SHA-256: 952acc329714e447b54d56be4ac1e47cca3d1f786d5fbb6865ecfa9fb209b63c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file functions as a link farm, containing numerous embedded URLs that redirect to various websites. Several of these URLs point to compromised WordPress upload directories or disposable hosting, suggesting an attempt to obscure the ultimate destination and potentially deliver malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7061

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://yingzhaoliuart.com/upload/file/78864297442.pdf In PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/v6n40u6iaekg9uisvqd13f2ig4/29897092336.pdfIn PDF document text
    • http://hcbarrett.com/user_area/file/80580302718.pdfIn PDF document text
    • http://rapet.hu/files/10221981693.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16133a85299aa3---begivetiguxiwosevo.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/41c9cf43f28f3aaa9f385c37f7d70cfe/lenawejabobavamot.pdfIn PDF document text
    • http://unite-chem.cn/upload/files/vuvazoxatuxazok.pdfIn PDF document text
    • http://aranysolyomfeszke.hu/editor_up/15011245536.pdfIn PDF document text
    • http://chiangmaicharmingtravel.com/ckfinder/userfiles/files/wofubumabamojufigu.pdfIn PDF document text
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/41837656282.pdfIn PDF document text
    • http://scandinavia-ex.com/images/blog/file/86161295046.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/talezil.pdfIn PDF document text
    • http://limobebe.com/userfiles/files/97027316025.pdfIn PDF document text
    • http://teakdeck.pl/files/file/82698255281.pdfIn PDF document text
    • http://poney-club-romilly-aigre28.fr/userfiles/file/xadutapero.pdfIn PDF document text
    • https://foodphotoshop.com/userfiles/files/34442581872.pdfIn PDF document text
    • https://consultemergingmarkets.cubsindia.com/files/44080737798.pdfIn PDF document text
    • http://humansharehouse.com/userData/board/file/94571483077.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613081b1a62fe---texokosiw.pdfIn PDF document text
    • https://wemservice.com/ckfinder/userfiles/files/nodinizibexozexiwosugot.pdfIn PDF document text
    • http://falerisztika.hu/tmp/rejizoredululijebafovona.pdfIn PDF document text
    • http://varadimasszazs.hu/uploads/files/64277659509.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=deadpool+movie+tamil+dubbedPDF 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_off0000b28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB28D 10488 bytes
SHA-256: 9741904b28b781cc5512d4c33e9a915831c60d76ac4c72a7aac43b543dde197a
font_01_sfnt_off0000ca21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA21 16768 bytes
SHA-256: 13e8f6df2e5aec8cab8bef2b4ffb282b23fdc81a35b0b4a1907522823492b8df

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