Malicious PDF — malware analysis report

Static analysis result for SHA-256 deaf0f485c99c2e7…

MALICIOUS

PDF

75.8 KB Created: 2021-06-10 04:18:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 3b6ca315678a89e0281badbc563e40e2 SHA-1: e3ab76ef15a9300f237b9732f123746c6f9ee17e SHA-256: deaf0f485c99c2e791e172ea50621701890767613f73a585c5ca2a712ddfe5ad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to file-sharing or blogging platforms, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://huntic.ru/pbw?utm_term=food+chains+and+food+webs+worksheet+answers PDF link annotation
    • https://gijowazav.weebly.com/uploads/1/3/4/0/134097260/dalijisunuzez-nasosemugu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481400/normal_60069c30bafe1.pdfIn PDF document text
    • https://xulijijexam.weebly.com/uploads/1/3/1/4/131453336/9023670.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473388/normal_5ff97348eb1c9.pdfIn PDF document text
    • https://wironutoti.weebly.com/uploads/1/3/0/7/130739747/fc73825c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483072/normal_5fc5e6e2a10fa.pdfIn PDF document text
    • https://jazakeramexevam.weebly.com/uploads/1/3/4/6/134615015/mimamatipodugo-podezakowewuvon-befux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493610/normal_5fc7a3e966a92.pdfIn PDF document text
    • https://lelebozo.weebly.com/uploads/1/3/4/5/134578107/fazutukegulekafuful.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480749/normal_5fec29a6e0cf1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414341/normal_5ff409a6ce4ec.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4379234/normal_60b335e7c4178.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391308/normal_605c03e873844.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nodisakajew.pbworks.com/f/mods_para_minecraft_de_xbox_360_download_free.pdfIn PDF document text
    • http://bizogug.pbworks.com/f/wavazosexoxosesakotiwezip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2fddb2e-d9b4-4347-afce-086003dcbc0f/wusibifogibetonozonel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/049ec71f-d7b0-478f-84be-0457eceb17a1/89623862862.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/242decc9-e692-4774-a752-421a503eec4f/el_examen_in_spanish_plural.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7546e9b-d74a-49d8-bcb9-2c755816e949/descargar_activador_de_office_2013_gratis_para_windows_10.pdfIn PDF document text
    • http://sekodegaxex.pbworks.com/w/file/fetch/144906351/you_make_my_dreams_daryl_hall__john_oates.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE987 5328 bytes
SHA-256: 47b56f51733b7ded819d4a390a505f6a6fc394d1475d077d3e00e2d4ce74c88d
font_01_sfnt_off0000fbb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB7 11080 bytes
SHA-256: 358b291ecca7827c207c1e308a628da255c99c6d40c0a7e9a2df7db53e1956b3

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