Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc63c41b06db26fa…

MALICIOUS

PDF

82.9 KB Created: 2021-10-16 02:15:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: da2929940255c665c85e26325629997c SHA-1: ae28d60f71d54eacdb7d46ee32330ab9729ae42a SHA-256: fc63c41b06db26faa691c7b3965378a82b681c39649b0ffe3959219042fb2a81
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for delivering malicious payloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript stream at offset 0x9709 is a critical indicator of this malicious behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://garnet-medical.com/userfiles/files/lalunojixisanabesefopolax.pdf In PDF document text
    • http://asesorgubernamental.com/images/file/1977808907.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/88887619012.pdfIn PDF document text
    • http://handgun.ee/media/file/76828710321.pdfIn PDF document text
    • https://wickedcheesy.com/images/file/batumoxopititune.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/oq4n5pg9c3meno3kacpmfqa0a1/gasonomazevekuj.pdfIn PDF document text
    • https://zaindu.drogomedia.com/files/galeria/files/22043748416.pdfIn PDF document text
    • http://trongtinpc.com/luutru/files/bujiniraruwenep.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/mg7tvjrem49o9i1cfg08rnfdbq/13397922674.pdfIn PDF document text
    • http://matsusushionline.com/uploads/files/67396038171.pdfIn PDF document text
    • https://reaga.net/js/ckfinder/userfiles/files/54186303124.pdfIn PDF document text
    • http://yummyschool.com/_UploadFile/Images/file/nimudozokukewurir.pdfIn PDF document text
    • https://playworkspartnership.ca/sites/default/files/file/40294730834.pdfIn PDF document text
    • http://kondicionery-noginsk.ru/upload_picture/file/dakirefozonupasa.pdfIn PDF document text
    • http://faptvmedia.com/userfiles/file/pidovosufofojabuto.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161408f342737b---85255175264.pdfIn PDF document text
    • http://kiko168.com/UploadFile/file/20210911035215208.pdfIn PDF document text
    • https://pharmawell.eu/ckfinder/userfiles/files/3541577048.pdfIn PDF document text
    • http://conflictfreeelectronics.com/ourprojects/chowki/UserFiles/renuka/file/ximenupewebimajopitu.pdfIn PDF document text
    • http://vngo-cc.vn/cooker/public/files/dujabugezib.pdfIn PDF document text
    • http://esllearningbydesign.com/app/webroot/files/file/xozisatisajepa.pdfIn PDF document text
    • http://cameragiaminh.com/upload/files/seduralopavinaw.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/HKUGBsJGI0E/uplcv?utm_term=clarification+of+termsPDF 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_off0000e550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE550 16188 bytes
SHA-256: 2fc5f17883e7f78f2a6382307c35e93597c7f8f6819d48d36d07e397beebe0db
font_01_sfnt_off00010e87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E87 10528 bytes
SHA-256: 2b4eb2d79012a0639b008e7c7874204d6f52dbfd86d9d493a696595443116921
font_02_sfnt_off00012684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12684 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1