Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd17a00426b299d…

MALICIOUS

PDF

92.6 KB Created: 2021-09-02 04:37:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f1e7f21c39efcf9d31ca9efd5c8dda0e SHA-1: 21711ec0b22e63c7170e87530d3ab2148b834da8 SHA-256: 1bd17a00426b299da10bb2710ad0b3001f97edf28f9a098d9a7493e5d65c6595
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a link farm hosted on compromised WordPress sites, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs, particularly those pointing to compromised CMS uploads, are the primary indicators of this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/01dedd09e791a3ac387abd06e102e149/wisuwebogopazizopemefan.pdf In PDF document text
    • http://chiaranannini.com/userfiles/files/jikokol.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d986f7123e---18273768279.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/kupijapinibobepifu.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076182bb736e---2988223544.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aec693a3a9a---13294980452.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/95d239fc02c77b29be50edc117df5d86/mosupexoki.pdfIn PDF document text
    • http://teraval.cz/res/file/pukuna.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16079089d54f63---17798486007.pdfIn PDF document text
    • https://madame-tina.com/ckfinder/userfiles/files/13297187506.pdfIn PDF document text
    • http://agierresrl.it/userfiles/files/16977688935.pdfIn PDF document text
    • http://goldenpeak.it/userfiles/files/tisugejifegokudino.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/23bcaa7b8b8b3b515065812e0c33fe84/77906084671.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/34249427762.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/3f2119b41ea5b64fdd3b7c6667f29ed6/dazawujifaran.pdfIn PDF document text
    • http://www.southpointinstitutehowrah.com/admin/uploads/file/mosipojipawixidomoseni.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160db434bd1388---gunilemunuvone.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/c3ef46ec38540be1cfd32c48cb5d423e/67290832472.pdfIn PDF document text
    • https://vienhung.com/webroot/img/files/gizuv.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/nodivewawifasoxutu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=the+highest+rank+in+the+indian+army+isPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011dd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD5 17880 bytes
SHA-256: 66b711e4a9d9bab9f2ec818dad2c6a0b9ce72e4d13f2ee985507bf00cc6326d3
font_02_sfnt_off00014bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BFF 10700 bytes
SHA-256: b4ab8ebd2912b676b0c4a7697713fa7e8f67cbcf8a8392cef59c94e3274564e9

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