Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0e7a92688a64010…

MALICIOUS

PDF

105.4 KB Created: 2021-08-10 01:15:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 299573732e2a3553e64518fed03971cc SHA-1: 862a1a32be09ebc6020081de34f8e8834dc611e2 SHA-256: c0e7a92688a6401024d511aac52bd2fadef3d67e222fe2fad875e90bee489389
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to compromised WordPress upload directories, indicating a phishing or malicious redirection scheme. The ClamAV detection and ML classifier further support its malicious nature. The file's structure suggests it's designed to host a link farm, likely to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6543

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 http://momsystem.ru/public/file/kukutuzi.pdf In PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f0a0c7525c7---70950659267.pdfIn PDF document text
    • http://gustosandvic.com/ckfinder/userfiles/files/pizasiboridedepot.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/85777844840.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c2021df0068---xisezevemiluve.pdfIn PDF document text
    • http://wib24-admin.de/uploads/file/duxavap.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/tadusokumemizax.pdfIn PDF document text
    • https://prosaison.fr/userfiles/files/36049333720.pdfIn PDF document text
    • https://coebmsf.com/userfiles/file/litow.pdfIn PDF document text
    • http://chalappuram.com/userfiles/file/96053573325.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/7584939985321c0b734daae9b6cd9f25/26962755862.pdfIn PDF document text
    • https://swift-tw.com/lcc/upload/files/supopunujajomudab.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc9becb029---1975287496.pdfIn PDF document text
    • http://bougerpourstarlight.org/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/82938931364.pdfIn PDF document text
    • http://centonze-vini.com/userfiles/files/66424236359.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/kijurutukuderexomem.pdfIn PDF document text
    • https://avgdesign.com/userfiles/file/83563693103.pdfIn PDF document text
    • http://jaika.in/images/documents/files/litugofap.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706f5827890---17339461384.pdfIn PDF document text
    • http://3suntech.com/UploadFile/file/20210722005555523.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b66f1ed24---44853008561.pdfIn PDF document text
    • http://hoanggiaphatland.com/uploads/image/files/sefawutejigapizox.pdfIn PDF document text
    • https://webhosting4.net/media/file/teremaxuluramumuna.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160e688e77b5d2---83065317172.pdfIn PDF document text
    • http://gtshotel.it/images/file/42913842426.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=figuras+geometricas+del+tangram+para+colorearPDF 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_off0001625d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1625D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00017a6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A6F 19924 bytes
SHA-256: 91030fa534bd220184cde084d3b013f9c805ad5c0ea0e9b9e8098d8e4dc448e7

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