Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c7044ecbb94833e…

MALICIOUS

PDF

98.8 KB Created: 2021-07-23 02:44:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 816d31bc6c08a3e08013da0b5f2fe46f SHA-1: 8f6e48f5988151fb61e8a03f5227ac7e645ab943 SHA-256: 0c7044ecbb94833e2c34be53e71b8f5a70c43656896042f3c3db3574c861ab77
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised WordPress sites, indicating a link farm designed to obscure the final destination. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the structure and URL patterns suggest an attempt to lure users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608621b765006---54645607450.pdf In PDF document text
    • https://hankilfood.com/upfile/files/pomiv.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1419f2e18---pemokekajabaze.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6343688023---woluxetijiwaleju.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/vufotajewisorug.pdfIn PDF document text
    • http://btc-ltd.com/upload/file/89017749601.pdfIn PDF document text
    • http://www.rotudavid.com/ckfinder/userfiles/files/posolotekodavejod.pdfIn PDF document text
    • http://chonburi33.com/userfiles/file/gevexokakodo.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16072ca3f7cecf---kikojena.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/cb0ba5302c3db64cac6d5ee3c3114ee2/nifajuke.pdfIn PDF document text
    • http://world-green-hope.com/uploads/files/53905745008.pdfIn PDF document text
    • http://r2doodles.com/clients/4/4a/4a4ed909dcef54c1e3ec6a0ce1d29f2d/File/99171810339.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c69e7c0e640---duledizapeku.pdfIn PDF document text
    • http://doingthing.com/downloads/blog/geust/files/92179120069.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/vvffj33n0vhl6ebu5098d4a6q2/84385213108.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/ns7f3hu6tr09jk2afvg79h7ee1/musin.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/inmjqehitnamcjd49ifoh7jntm/51459564456.pdfIn PDF document text
    • http://come2menorca.com/images/file/36361706767.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/98700767560.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160716b6eea32b---83396387644.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/62122604969.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080eb726a9fb---48989067306.pdfIn PDF document text
    • http://chonburi33.com/userfiles/file/feledekipewenu.pdfIn PDF document text
    • http://yulintimber.cn/d/files/53743708843.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=spanish+words+that+start+with+i+to+describe+someonePDF 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_off00011c91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C91 17952 bytes
SHA-256: 9af802ec793f2cdb22906772ec4549a0fd11524c5af0a38b3a063433a50c9948
font_01_sfnt_off00014b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001633d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1633D 11036 bytes
SHA-256: 1532c88fa4dea0b4398c6ff36c477d2d9efb8d4f7d746d81a9ced19e6191e3e1

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