Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e95ed155b5c185d…

MALICIOUS

PDF

105.7 KB Created: 2021-08-04 08:57:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1ae98dc164a8d5563b0e55806915bc0f SHA-1: 4b9b6a8b2fa5c18aa364bb0af917d28dcc17e0a1 SHA-256: 0e95ed155b5c185d837fee5adb8e1184caec6b9b323b6dadc1c46e012eebb835
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised or disposable hosting, indicating a link farm designed to lure users to potentially malicious sites. ClamAV detection and ML classification strongly suggest malicious intent, likely related to phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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://restravel.ru/ckfinder/userfiles/files/woloxoriwufidewawuzafemi.pdf In PDF document text
    • https://itandem.net/ckfinder/userfiles/files/38064840345.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/612a39dcc1bd705890c0e5471477b75a/romidesiwutuvus.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607280126859a---vogavemopama.pdfIn PDF document text
    • http://portaldo.eu/contenuti/upload/file/36167316948.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a36bb089efc---77265576622.pdfIn PDF document text
    • http://twozonechickenlasvegas.com/uploads/files/mitusox.pdfIn PDF document text
    • https://x-software.cz/data/file/66091090807.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/userfiles/file/wodukuduzeso.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1621393494.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858271c2b84---6122639699.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16082c45610606---zudejesagisonerig.pdfIn PDF document text
    • http://novichiha.ru/pic/file/sunivubivodos.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/wedimabuvuxino.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/tacn0p9cfmqql3kf92hrkopfb2/nibozopanabepe.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/lonofadede.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/8bebde844814aa9f3ab2d88068192568/nopapagosovibiz.pdfIn PDF document text
    • https://thaiwoodengames.com/files/upload/files/26702720520.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f3e56b674---sowizus.pdfIn PDF document text
    • https://espiber.cl/images/uploadedimages/file/63887097528.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/xobolole.pdfIn PDF document text
    • https://makeswebsites.com/clients/c/c8/c8c605999f3d8352d7bb792cf3fdb25b/File/90789237977.pdfIn PDF document text
    • http://hankyunget.net/userData/board/file/88682635342.pdfIn PDF document text
    • https://www.highlandernepal.com/assets/ckfinder/userfiles/files/jiwepaxuzaki.pdfIn PDF document text
    • http://world-housing.jp/ckfinder/userfiles/files/febipivipun.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/69277395183.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=digital+cinematography+david+stump+pdf+free+downloadPDF 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_off00012ff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FF2 11432 bytes
SHA-256: 8faa53973d7e43ae5cb19bfa29e0bf9fa01bb37e6153376ba64f42c61b14d753
font_01_sfnt_off00014a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A9B 20292 bytes
SHA-256: 56498d72308cdf89e98a6c111850931add12a7107db76bcb583eff6ccd6dff70
font_02_sfnt_off00018016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18016 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1