Malicious PDF — malware analysis report

Static analysis result for SHA-256 59007745c1910fd5…

MALICIOUS

PDF

70.4 KB Created: 2021-09-30 11:14:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5cbca8c1322208851e3ed1e3cd41d6b4 SHA-1: 649bd8b8d9c48eb2f8edbedfda551f1e321cd5e2 SHA-256: 59007745c1910fd5cfba659aab58e08358e80651936ef6a37764ad978013fd22
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or are hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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
  • 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://www.fuchingrading.com/upload/file/jomobi.pdf
    • https://pomtco.com/technical/files/file/nadelojazakumowenakomix.pdf
    • http://danies.ru/ckfinder/userfiles/files/90072591484.pdf
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/b6014d31008c1f789eb806e4bf94e067/zidexiwijetajerano.pdf
    • http://auto-spec.ca/fck/file/28430358165.pdf
    • http://infoegrafica.com/userfiles/files/dotitaxeloreneworuwenova.pdf
    • http://driscollandgibson.com/images/edit_images/file/lagedutigojuxul.pdf
    • https://ietc-oman.com/userfiles/files/vusugibobibedorud.pdf
    • http://suyogmaratha.com/editorimages/file/84572703802.pdf
    • https://onutglen.com/caningest/images/file/9861197165.pdf
    • http://ya-ke.cn/admin/upload/78041040835.pdf
    • http://imosa.asia/uploads/files/202109052246208823.pdf
    • http://birzebbugastpetersfc.com/files/file/33816555804.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161429416acb26---44978136410.pdf
    • https://prettygreekvillas.com/admin/fckeditor/editor/filemanager/connectofile/83691993494.pdf
    • http://veganogle.es/uploads/ckfinder/files/jedanirofijazur.pdf
    • http://mwcapital.net/ckfinder/userfiles/files/83200707366.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16130d5fb227e8---mutegagugafetarexanoka.pdf
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0923/59454886e9c51303966f2bc99a234a8f.pdf
    • https://jamuiboe.com/webroot/upload_media/33728057442.pdf
    • http://fgosvo.ru/files/files/guvumejobedabipobatusuf.pdf
    • http://professional-tuner.at/uploaded/file/91815930672.pdf
    • http://metallpress.ru/files/58919336755.pdf
    • http://alt-1c.ru/userfiles/file/govanog.pdf
    • https://floridahouselottery.com/test/userfiles/file/70486374806.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=figure+of+speech+of+hyperbole
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4a8.bin
94576e79cbd617768fd5fc265751333bc5b1ad034718b0b5eb45dbd216569949
pdf-font-stream PDF embedded font (sfnt) at offset 0xB4A8 10724 bytes
font_01_sfnt_off0000cd27.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD27 16792 bytes
font_02_sfnt_off0000e539.bin
7638247bd56bca253d2f44ea956ff082b8cb32d9c430024356f70f398c4c950c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE539 15284 bytes