Malicious PDF — malware analysis report

Static analysis result for SHA-256 49bef2ccbeb270b9…

MALICIOUS

PDF

83.7 KB Created: 2021-09-09 23:16:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: b7111406d646a15a69fe6560619c7a56 SHA-1: 2ea3cf4b2088c32391a01a652f8a2d165f0f4ec3 SHA-256: 49bef2ccbeb270b970c16e02d23f4ecbedf55bfa3c19972670e4787dbff674db
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating a malicious intent to redirect users to potentially harmful websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the ML classifier strongly suggest malicious activity, likely for phishing or malware distribution. The embedded JavaScript is the primary mechanism for executing malicious actions within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • 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://garglob.ru/uplcv?utm_term=gboard+update+emojis PDF link annotation
    • https://kp-bs.ru/upload/files/58755715680.pdfIn PDF document text
    • https://nutstudio.it/userfiles/file/92350249309.pdfIn PDF document text
    • http://krukaiart.com/userfiles/files/tigunavasutit.pdfIn PDF document text
    • https://xn--80apefbdm9ah5g.xn--p1ai/userfiles/46025284700.pdfIn PDF document text
    • http://albertopizzetti.it/userfiles/files/10640230801.pdfIn PDF document text
    • http://benly-carson.com/product/files/98532293038.pdfIn PDF document text
    • http://kimdaiphatsteel.com/Images_upload/files/6998017846.pdfIn PDF document text
    • http://algarestofos.pnh.pt/js/ckfinder/userfiles/files/59747698896.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/vinipelejomatod.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/76496885159.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/janajosuzubigazogedor.pdfIn PDF document text
    • http://candleelectricals.com/uploaded_files/userfiles/files/99825114937.pdfIn PDF document text
    • http://www.farmaciavictoriayjmleon.com/userfiles/files/wujozafosedineliw.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/07hq080koqr4omj7j6i1ao00l7/56158131723.pdfIn PDF document text
    • http://www.hz-kontejnery.cz/ckfinder/userfiles/files/93015384571.pdfIn PDF document text
    • https://ags-car.60km.com/upload/files/xevifo.pdfIn PDF document text
    • http://spakimthi.com/upload/files/83350415553.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/20v96okote5aag6dps97rbdmjc/92164389984.pdfIn PDF document text
    • https://jgranit.pl/userfiles/file/7524205938.pdfIn PDF document text
    • http://poslovniimenik.net/firme_data/files/nozorenef.pdfIn PDF document text
    • https://bhavanarayanaswamy.org/userfiles/file/21049997836.pdfIn PDF document text
    • http://wahluenfty.com/userfiles/xevofutiworalivizunut.pdfIn PDF document text
    • http://intertribo.sk/files/25531342259.pdfIn PDF document text
    • http://jafra-com.at/userfiles/file/kefiremimimizeb.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_off0000daa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA2 10812 bytes
SHA-256: 1d82e314e82ec5b19a2103c096558018d1af33281bfa29697efca0dcaa18a4f7
font_01_sfnt_off0000f354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF354 20360 bytes
SHA-256: d2a3d49eeda9f80e113e03a92e98e49be0f7501a42fb680310f13e5cf73391bf
font_02_sfnt_off00012903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12903 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1