Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3ac3a7a4942909a…

MALICIOUS

PDF

81.6 KB Created: 2021-09-09 08:09:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 09cef8ee5585978aeed023dd86fdb2ba SHA-1: 7d3c56b56ea8d70ce842f17aaec8820d4ed28c28 SHA-256: f3ac3a7a4942909a28fc6010ef66d9985e2c4f5db7a62a057c5ab88156046f22
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The presence of embedded URLs and the PDF structure itself are indicative of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://villahetzwartepaard.nl/survey/userfiles/files/64859329355.pdf In PDF document text
    • http://gzsjlt.cn/userfiles/file/wokokemagiz.pdfIn PDF document text
    • http://hanifeugur.com/image/files/kefedeserodojapajadumoxaj.pdfIn PDF document text
    • http://xenangheli.vn/public/files/disigoponofetejiwiv.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/161329306d3da3---45387094950.pdfIn PDF document text
    • http://wpklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jikusexomir.pdfIn PDF document text
    • http://fantacyhandicraft.com/userfiles/file/81048202978.pdfIn PDF document text
    • https://marathonblainville.com/userfiles/files/85801590283.pdfIn PDF document text
    • https://rux-thai.com/ckfinder/userfiles/files/84425253361.pdfIn PDF document text
    • http://americansemitruckparts.com/d/files/12098528071.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16137b7ae525bc---pipezofonogutaxa.pdfIn PDF document text
    • https://at2-turbo-j3t.com/contents/files/95190096173.pdfIn PDF document text
    • http://ronaldtan.nl/images/photo/viramitevaxim.pdfIn PDF document text
    • http://plncse.hu/php_data/file/43220126383.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613956dc0edff---vitakefux.pdfIn PDF document text
    • http://tai-yang.tw/taiyang/upload/file/napidebibobededop.pdfIn PDF document text
    • https://signatureshreyas.in/userfiles/file/nofizinugukugizogabuv.pdfIn PDF document text
    • https://nusamulticentralestari.com/Uploads/userfiles/files/36701852520.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/4422676057.pdfIn PDF document text
    • https://negaratoto.com/contents/files/jozukuvoxa.pdfIn PDF document text
    • http://sydjpg.com/images/upload/file/20210906_161815_104.pdfIn PDF document text
    • http://eqletstalk.com/uploads/files/202109060825279528.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/3068065456134fd4f1c203.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=watch+drive+online+free+123moviesPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D1 17876 bytes
SHA-256: 30a08ab5872724121d18ebce3abf4dda229dad64531460e16d7bec84d00505c1
font_02_sfnt_off00011f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F17 11144 bytes
SHA-256: c0e89bd74532ca99d601034cee131183c5e9e0fe0d324a075e3f8e43f297ec5e

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