Malicious PDF — malware analysis report

Static analysis result for SHA-256 9722aabc2818ae0d…

MALICIOUS

PDF

80.6 KB Created: 2021-08-15 00:56:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c4dcf55d2e1f0951f8848af2ba8c9f53 SHA-1: bda37e50a9067244ec4df226365198d98ea57279 SHA-256: 9722aabc2818ae0d423dd6bc072698bac42e7a0f495dde725c610b663c4064e1
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to websites hosted on compromised CMS uploads or disposable hosting, indicative of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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 http://ildongwire.com/userfiles/file/80873627547.pdf In PDF document text
    • http://linhkienhunganh.vn/luutru/files/72643818972.pdfIn PDF document text
    • http://inwama4.vn/webroot/img/files/71525677175.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a552a9836---pizozabinuvutolevezoguv.pdfIn PDF document text
    • https://mudraconsultancy.com/uploads/files/21315192951.pdfIn PDF document text
    • http://nnhs1964.com/clients/a/a2/a2d7b74ded15306de89ee4bbe2f7ed3f/File/8826541827.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/zetosamu.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/renunekevof.pdfIn PDF document text
    • https://studiorampinelli.com/file/gukapulidajadasizo.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f784cdced---zinojusoli.pdfIn PDF document text
    • https://camelcarpet.org/d/files/55721882562.pdfIn PDF document text
    • http://ambcavallon.eu/userfiles/files/dusedas.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202107070550295410.pdfIn PDF document text
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rawomubejanazixobakigige.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/5e613c56166da43ee37e759b97aee6b4/23685023851.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16117a072890b8---nipupor.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc4605a925---mezixo.pdfIn PDF document text
    • https://elearning-chemistry.ro/userfiles/file/63255264092.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/24525139641.pdfIn PDF document text
    • https://firsatoyun.com/calisma2/files/uploads/tumawetazu.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1611838f284f12---15885552262.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/4dc27df8643c401cabb2e74c9a7395f6/neraz.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/84990766466.pdfIn PDF document text
    • http://greddy.com/admin/common/ckfinder/userfiles/File/bebejeraganikofagiputax.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/f933c919d25b267eefabbeb647bcce27/sotororafete.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/kj5tf17ais1cn078mbbe1aj34i/41874913680.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/akvi3jec9ppngangkjc6nir0v5/37102356493.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=vince+kath+and+james+full+movie+2016+tagalogPDF 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_off0000d2f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F6 11640 bytes
SHA-256: b1db1fbba4ca57f38153360f4a12ce11741ceffff2a434bee4eee3f49f37f834
font_01_sfnt_off0000ee55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE55 17216 bytes
SHA-256: 4b304f29ac31ec6144c243bdede7b0770a952acf3a70a8e6c4152f470a9f266d
font_02_sfnt_off00011b13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B13 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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