Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f016a6bef0cdeca…

MALICIOUS

PDF

85.2 KB Created: 2021-09-18 07:05:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9c7fe37476f9be4169b0514086cd8b73 SHA-1: ac2c371f07bd880ba184d99c8b642ad80b0aa82d SHA-256: 0f016a6bef0cdeca62afc90671e66e968b9cfd87575e4399179035d24acee487
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to various domains, suggesting a phishing or link-farming operation. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates the PDF is designed to redirect users to multiple disposable hosting sites, likely for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 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 https://infrive.ru/uplcv?utm_term=pdf+organizer+app+android PDF link annotation
    • http://angelescare.com/userfiles/file/kiporiwoz.pdfIn PDF document text
    • http://kartinatv.org/uploads/files/54252287026.pdfIn PDF document text
    • https://dacola.com/upload/files/65269192175.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/u1d00hqup9bttdsavuj6btrgpq/3962822484.pdfIn PDF document text
    • http://shopcloud.cloud/ckfinder/userfiles/files/xuvob.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/vezolesiponaxevaloneturaf.pdfIn PDF document text
    • https://renteci.com/imagens/file/39895507058.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/15005327498.pdfIn PDF document text
    • http://flex-link.cn/uploadfiles/files/mukugulawakobotu.pdfIn PDF document text
    • http://topnotchimports.com/ckfinder/userfiles/files/48540738474.pdfIn PDF document text
    • http://nceed.kr/pds/userfiles/files/48701363604.pdfIn PDF document text
    • http://ferrocom-spb.ru/userfiles/files/vizakelilimaderuwinin.pdfIn PDF document text
    • http://hamishehbaharcarpet.com/My_Project/Hamishe_bahar/ahar_img/files/fozasivuf.pdfIn PDF document text
    • http://cableesmaltado.com/d/files/widemaxigaxoxixu.pdfIn PDF document text
    • https://rumputhijau.com/contents/files/20422162534.pdfIn PDF document text
    • https://drticket.ir/basefile/drtiketcom/files/38636501244.pdfIn PDF document text
    • http://fatamorgana.fr/uploads/assets/file/luwijidafiradom.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/fawofedaxeluvosa.pdfIn PDF document text
    • https://asesoriagade.com/app/webroot/files/files/dufopetolazotimonajuk.pdfIn PDF document text
    • https://www.asoriofrio.org/ckfinder/userfiles/files/76786343336.pdfIn PDF document text
    • http://home-hj.com/up_photo/file/gupoguxubilixireraji.pdfIn PDF document text
    • http://dkmmotor.com/files/userfiles/file/44764002377.pdfIn PDF document text
    • https://proartgaleria.hu/files/files/51925247666.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc08427a01---6420825616.pdfIn PDF document text
    • http://hilimall.ae/uploads/files/bonatiset.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://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_off0000eb84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB84 10424 bytes
SHA-256: f741f5e81871369cce81678dedc852e1d46bc4043a6d593764805baa9f8425fd
font_01_sfnt_off0001030a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1030A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1C 17192 bytes
SHA-256: d2943bf0a2a2f56d1ebb9d9849b51a85ddc44a835aab9336c2fc867d40ee5aab

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