Malicious PDF — malware analysis report

Static analysis result for SHA-256 94732ef64c2e1b2a…

MALICIOUS

PDF

87.4 KB Created: 2021-07-10 13:36:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 30e27d89733dabead67631801e9f68a0 SHA-1: d96740cf86dd11b8b8e74a06ed1e56d9dd1c42df SHA-256: 94732ef64c2e1b2a16b150c38d2ed8c49d02854db1246362709cefafdb3d2522
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm hosted on compromised websites, designed to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of numerous links to PDF files on compromised CMS uploads suggests a downloader or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/90c44498c346769994ae559de00d6520/wipipawom.pdf
    • http://stewartreunion2020.com/clients/2/2a/2a0d9dcdd57715375c9f4393c24df0f2/File/20580512624.pdf
    • http://ministerium.pt/files/22431151676.pdf
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/ed8bacb2b06e70bba2c009eccbe0fad9/jesaw.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/3r7chmgphf8v6jo7vcilahc7q5/sofewom.pdf
    • http://mayamalay.com/clients/874202/File/38294501945.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/3vd49g4ue25gj8s2eao2kskig0/vederifo.pdf
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/175090873c8d6542abd4a18234aff57f/sareravufowelefevafa.pdf
    • http://gasthaus-steinkirchen.de/img/editor/file/29809351084.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/ndqlt3dvoeesfhlhr3f2lpqat6/setokevi.pdf
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/7fd7c2ef75a5376fbadba30a34acfb81/98032937824.pdf
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/8b7c7a7ca728b4c3681375d55b641d49/lijupinu.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607542d64af2d---pumelonuwi.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160a208fc42a2b---bukotosewagajo.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606e68f56f345---zirejuvibojumilak.pdf
    • https://nhorizontours.com/userfiles/files/82663687879.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607389d1926ac---jebedoxu.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/00df78fca238d2cdb46ad8b18d7e1a15/labevuniwuzezaluv.pdf
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/32520a6ff372ccee00ea3545d8416523/siwemerovamuseg.pdf
    • http://almar-bus.pl/userfiles/file/25324859652.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4c525596c---6289823816.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c596a9e8bf7---85165654139.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=steps+in+software+development+life+cycle
    • 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_off0000f295.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF295 16792 bytes
font_01_sfnt_off00010aa7.bin
c58a8a9a589906a9859ead5bc8675fe1fde24e91c517a3563a22e6eda40b077d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA7 16940 bytes
font_02_sfnt_off00013627.bin
c830fa4291dda50e3b716d6ba03b9ad96c50c7a8b872230277cd2b42778fb868
pdf-font-stream PDF embedded font (sfnt) at offset 0x13627 11124 bytes