Malicious PDF — malware analysis report

Static analysis result for SHA-256 14fe607dc797de38…

MALICIOUS

PDF

80.4 KB Created: 2021-09-02 02:29:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8a47dcdafea295a53e5ec72c2781a797 SHA-1: 3121a30e0420afbeba31ec6fceb97d0ba8ccdfa8 SHA-256: 14fe607dc797de382c40c514c870fdc0a2205a4f6e0f9a30f1f22e0268571615
156 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to obscure the true destination or leverage compromised infrastructure. The primary purpose appears to be redirecting users through a series of links, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://kaupa.cz/userfiles/file/pogoxabuw.pdf In PDF document text
    • http://www.jindatunnel.com/up_files/file/bolovupu.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/fikuzozirabepoved.pdfIn PDF document text
    • https://rosenstein.lu/userfiles/files/96191824433.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b21b795a5f---60695521266.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b104104aea5---pelel.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/forodunifikiseponilaluvot.pdfIn PDF document text
    • http://av-jet.ru/userfiles/file/kavawovamepotoxu.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/d6k3es9gj7tqq3f7dgvdqogtqb/duxeguxonidef.pdfIn PDF document text
    • http://pokeocncafe.com/uploads/files/67213551489.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/64895872191.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee6f75f894---ragizurifelek.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/welunupawovojimujiwado.pdfIn PDF document text
    • https://swift-tw.com/lcc/upload/files/rapepipimozurapojivowobew.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/a6c10ff464bc59e4c3e17ec4e0683bc0/76055963542.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/f3142fe8723f2c694ae59be482a09e6a/xotigudesunanufokufal.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af7f629464b---wetatag.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc075e9279---lojezuj.pdfIn PDF document text
    • http://carriewoodfamily.com/clients/5/5b/5b9f2fb360c4065436fb7fe1267c3612/File/56394508023.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/73503117dd3cf06b3b96ecb849f8507a/68401792952.pdfIn PDF document text
    • https://noithathoaphat11.com/upload/files/penijozirufatuwirojo.pdfIn PDF document text
    • https://grandhotelbulgaria.com/userfiles/file/tewom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=nicknames+for+willowPDF 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_off0000d3db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DB 10556 bytes
SHA-256: ee067479c5cd5fbcd2e5c4fa9cc3fb78698f96d0d882a22551f52849010e1a54
font_01_sfnt_off0000ebf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF4 17576 bytes
SHA-256: c6e0510b1c77169f3bcdd1b051cf62d9e84c0ca456a61b6852d7f445c3602c68
font_02_sfnt_off00011961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11961 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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