Malicious PDF — malware analysis report

Static analysis result for SHA-256 46b5cf0029b8400f…

MALICIOUS

PDF

90.6 KB Created: 2021-06-29 05:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3547042bc80201c45b20a14902d3e213 SHA-1: d00f81e4e43b00b40302688acbfd9970a89119b7 SHA-256: 46b5cf0029b8400f0c0ac1bada2dad1df1b7c5a5a70cc0e784f2d2ff71a1656b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery, potentially leveraging embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a285152c5a5---gevegidefaxopalemirona.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/1ehppcoc3h3oc4el51m5afin11/penapumid.pdf
    • http://brainbond.ro/userfiles/file/bijomuvovizenewupelifufiv.pdf
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/605a9312da7c6345e01e4e9230898849/doxugenumagakosufonok.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/45a823c88843408cb0fb90020f6ff255/povivugujobokenamasino.pdf
    • http://sillajen.com/fckeditor/_upload/file/36402990185.pdf
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/a6088767f6764c3f3b05c613960e9bb4/48696964188.pdf
    • https://nothingbutsafetyglasses.com/userfiles/file/55314594473.pdf
    • https://angkoronetour.com/userfiles/file/73553873871.pdf
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/7grhjosteua40rs73krh4r7q41/lozadavuraku.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ca8dc7271---jofogubidi.pdf
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/71e04e51bf93eb2ce9f846f146557474/87627313071.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160c541c909c77---71956760117.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16076667fe09af---radunalimijiwexinutixe.pdf
    • http://timavoshipsupply.it/userfiles/file/14370972380.pdf
    • http://www.cafeinca.com/img/public/contenido/file/43971686517.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7fc2838809---bovobexotusobamivas.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160999d5ba1ff5---zemefavu.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/6nck4lrl2jgorap114g23sb47d/50804793659.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160934cdb1c8ac---dobow.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073ea2443444---novezoj.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=free+robux+generator+no+human+verification+no+survey+or+offers
    • 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_off0000fc5c.bin
7e082f844fdffbf80421561f35bf70f23b33d901bcf9ded80c2f4c369872a682
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5C 11236 bytes
font_01_sfnt_off000116a0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x116A0 16792 bytes
font_02_sfnt_off00012eb2.bin
49b4bcb2edb9b82418d0a30ba46da04811b9b28060c6c9722ffd88faf669c1df
pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB2 17548 bytes