Malicious PDF — malware analysis report

Static analysis result for SHA-256 70144d6d4677c67d…

MALICIOUS

PDF

130.0 KB Created: 2021-06-26 00:05:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: afa2727d581dca8e23470dea7ee5b760 SHA-1: e1868c196164a9da197abbcd17ffc631b317d1b6 SHA-256: 70144d6d4677c67d1976bf79722e094f73260548299f7ea8509fb04294af2576
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress installations and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious campaign, likely involving redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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 https://queure.ru/uplcv?utm_term=cities+in+nagaland
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160cff686d863c---18435036064.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/4fd5fdc5693b8eee08353c9034c671f2/lopidixikotuda.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c99e04ca22b---nonekov.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/87ad444196692c657c93e50dbc9575ec/83804371108.pdf
    • https://isosklo.cz./uploads/96842497329.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c379b3012---sunakeg.pdf
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7de1e7dcf---paluwilu.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6dec37e798---60318371517.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba0eb0223b---dezomapulupupu.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609468a145645---mobuxaj.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d44dd6e845---luzapaxaru.pdf
    • https://stbenedikt.ch/userfiles/files/vovumidumotamomuxafupek.pdf
    • http://autoscuolepintozzi.it/userfiles/files/powejitafemijej.pdf
    • https://coebmsf.com/userfiles/file/litow.pdf
    • http://learnazia.com/fck/imagesfile/xolonesajasaletumawejim.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd4fe55844---21096106938.pdf
    • http://uni-farm.pl/ckfinder/userfiles/files/betizazaviwix.pdf
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/qkml9vtnjs56di6ce3k0sju9h0/55918915423.pdf
    • http://photo-preiss.com/upload_files/files/mosesutiji.pdf
    • http://kpdb.org/userfiles/files/1682846279.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/l8o3cjfv5f05tpb7205mf8lmhn/33503224710.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b09d28f323e---dejekasawonajogitimidu.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b9822533a---gilunifavimorexafilew.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16082027dc4b79---19505226019.pdf
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854cd8c3181---kesibirisijum.pdf
    • 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_off00019969.bin
9f19b1d013707b9e729df918cbc277c9628454ba4f3e8548673990bb5adbcfb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19969 19084 bytes
font_01_sfnt_off0001cb99.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB99 16792 bytes
font_02_sfnt_off0001e3b0.bin
74689f15427444537f5f63315f5f49b3641e07b49507773567a002d8f0a679d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E3B0 10236 bytes

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