Malicious PDF — malware analysis report

Static analysis result for SHA-256 091cc05c67ff5089…

MALICIOUS

PDF

101.1 KB Created: 2021-07-31 14:27:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c3ffa9a3c3a73ac4602098c28ae15c9f SHA-1: 17ab4954f966ff371c559139d1325f134f9d2eb1 SHA-256: 091cc05c67ff50892287edfc491a8ce6706e112933d9c5a92838acc8b3ff272d
164 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to multiple domains, some of which appear to be compromised WordPress installations, suggesting an attempt to distribute further malware or phishing content. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 http://hodgesmageefamilyreunion.com/clients/c/c9/c95619ca3ec29dd030dc8935b97378d4/File/88788497348.pdf In PDF document text
    • http://mywymc.com/userfiles/file/37669022955.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985d7c1cf7f---bixurojupadow.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609227884e12b---15246355946.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eb2c6d1fb7---23443044964.pdfIn PDF document text
    • https://fortworthdental.net/cmsCart/upload/file/26334003745.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/dfd5a514520dbaff89e35685744e3070/zadugizig.pdfIn PDF document text
    • http://tscyw.net/userfiles/file/20210621152533_ft0zdc.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/joruzun.pdfIn PDF document text
    • http://gilbertthomasreunion.com/clients/5/5f/5f56fe696be94dde62972871c8a9bc28/File/gifajema.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609cffefcc9eb---fobigaz.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/c7uco8ietva8o73fq770rumep3/27280594107.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/pumrhpr7f6ku1hq3odvva5vc73/94799804055.pdfIn PDF document text
    • http://wellogo.in/userfiles/file///18973158484.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/44b331c14f9ab3244906f8d8d81bed57/2491822264.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/25e28785c41a702575b8dc08032616f4/7193976030.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/a0mr845d77fs7lpoon4qcb8mjc/66410366439.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/wepenetewivopu.pdfIn PDF document text
    • https://bluza-shop.ru/content/File/70400805961.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/c6c90be3c9389b4de8ceb866a815c561/10221288356.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/94e87cbbcdfcbb0428e84aba8c51da1c/38915121204.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ca2919a87---nisidixemodaxabugugufam.pdfIn PDF document text
    • http://pvvc.cz/files/92064206706.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16099c3a095cc3---tulekipiw.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/madoza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+install+bodyslide+for+skyrim+special+editionPDF 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_off00012261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12261 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013a78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A78 11204 bytes
SHA-256: 0e82b18b5c33dd17b2a02577a604b42b0d658b0d1ee7cc93295657639660bb74
font_02_sfnt_off00015485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15485 18192 bytes
SHA-256: 8607eb2c348a46d69bf5b3f9b6bf8ca9628c90e85b78df5c008edae8036ffdb6

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