Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e9caa3d0e6c27cf…

MALICIOUS

PDF

74.2 KB Created: 2021-09-07 08:07:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0ca10bdf3c66bc787c91de82de5508d1 SHA-1: cfe66fb7e501f5522a1174fc24e894f398364882 SHA-256: 0e9caa3d0e6c27cf0bc2a0e91bf616710edae4fe20d2eba8128a3b414ec323e2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised websites and potentially malicious content. The presence of external URIs and link farms suggests an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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
  • 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://iccj.jp/images/uploads/fckeditor/file/mirobiviregofagekoga.pdf In PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/00a462d942281b5e6a7d7af25dc380ea/69334963623.pdfIn PDF document text
    • https://hmanagement.net/userfiles/file/gotaxutulonukexuwuselox.pdfIn PDF document text
    • http://centralcogtc.com/uploads/file/legajanuv.pdfIn PDF document text
    • https://braintreeclinics.com/app/webroot/img/files/18363747160.pdfIn PDF document text
    • http://ahrestygz.com/userfiles/files/20210701_051739.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607293e30b550---1754304798.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/5ebf2d4c0355b497cde3a88fc7e440cb/58599905736.pdfIn PDF document text
    • http://broorybulldogs.com/clients/33993/File/74790444957.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/b76e4a0d79b7ae747ce9f3b334520127/zotifusefesurebebutuna.pdfIn PDF document text
    • http://lustigersteirer.at/userfiles/file/sugigub.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/11469259284.pdfIn PDF document text
    • http://lukinserv.hu/file/gadaloz.pdfIn PDF document text
    • http://ubest.ru/images/file/ziboge.pdfIn PDF document text
    • http://vantaibactrungnam.vn/upload/files/62737611662.pdfIn PDF document text
    • http://cichanski.com/Upload/file/87466150185.pdfIn PDF document text
    • http://likebarcode.com/image/files/20210705_084337.pdfIn PDF document text
    • https://smilaxlabs.com/userfiles/files/polerupi.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d9a573f70---71464380509.pdfIn PDF document text
    • http://osrclass1967.com/clients/8/84/84e84eb3bb32f45446e669e24fea3ebc/File/7286812597.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/wodevezi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be76df90492---luxakaf.pdfIn PDF document text
    • http://ubest.ru/images/file/37261400249.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/fukesasajokenusasux.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/0dfe9bf93c4055819ec771f7126dda06/90537344599.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=common+and+proper+nouns+worksheets+for+grade+2+pdfPDF 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_off0000bf33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF33 16368 bytes
SHA-256: aab9c4d5609d19fdb45f399a4d9965336f53b825e467f2370ce25ea0fe6b1ba0
font_01_sfnt_off0000e89f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000100b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B6 11236 bytes
SHA-256: db640d31049ef1a2755df267ebe54cfb072a34fb534279f46f6f10a7d2049e8d

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