Malicious PDF — malware analysis report

Static analysis result for SHA-256 af93630a0a344d06…

MALICIOUS

PDF

67.5 KB Created: 2021-02-24 02:47:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b4ec21b1a650abc75342d1e06805e29c SHA-1: dfbd54771498595a817b784d3029c69d086b9b5d SHA-256: af93630a0a344d06da5c6d9b581f7018abed5e4795a5437fe194d900c65c1d43
184 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=bill+nye+atoms+worksheet+answers In PDF document text
    • https://cdn.sqhk.co/tobetusibu/nFjcghs/wish_apple_watch_38mm.pdfIn PDF document text
    • https://cdn.sqhk.co/vumorumuvogi/AQ4Rnge/nvidia_physx_software_for_games_free_download.pdfIn PDF document text
    • https://nufujemirifo.weebly.com/uploads/1/3/4/8/134868255/titik.pdfIn PDF document text
    • http://otomail.business/20978196774en5l4.pdfIn PDF document text
    • http://voztrans.ru/bureau_d_angle_informatique_ikeaf1l7h.pdfIn PDF document text
    • https://cdn.sqhk.co/tigufarejeti/0ghMwjh/tangled_2021_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/pegidago/EhhLieU/sixawadanilazoxoda.pdfIn PDF document text
    • http://hushseo.online/bangla_tv_live_all_bd_channel_apkl0v8z.pdfIn PDF document text
    • https://cdn.sqhk.co/xusopusavo/gihgfif/repan.pdfIn PDF document text
    • https://cdn.sqhk.co/datawafag/jezhjge/81067915577.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/IAwSjeH/medupav.pdfIn PDF document text
    • http://getcabinets.xyz/316051298100held.pdfIn PDF document text
    • http://mmamba.ru/kebiwibigigenosigufavane53eim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/45658234635.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_off0000cd14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD14 5232 bytes
SHA-256: a232b3e9f150c7aa0560c58cb2f6362db62c84caf865119590290db10e5bc7aa
font_01_sfnt_off0000dec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC7 10080 bytes
SHA-256: af437407636da071b1321bd1a71084c93e9e9222d966e979935f3d81e28e7ce0