Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba4512bd6cae05b1…

MALICIOUS

PDF

74.8 KB Created: 2021-04-05 09:23:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6128bf33313060cab7798d3521e6f7e SHA-1: 98ec24a8b37e2c5e7bb26b2319e9d1ea86209e4e SHA-256: ba4512bd6cae05b15a10cf3bec8b373b09261469638e69b860b526d6aba71b4c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. The document contains numerous embedded URLs, many pointing to disposable hosting domains, which are likely used to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a link farm designed for SEO manipulation or traffic redirection, further supporting the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/aws?utm_term=2006+honda+civic+ex+coupe+headlights
    • https://static.s123-cdn-static.com/uploads/4469358/normal_5ff3fcceb7dcd.pdf
    • http://runolive.com/la_caida_de_los_gigantes_gratis2pjhq.pdf
    • http://peuly.xyz/what_time_does_stock_market_end_todayo83sf.pdf
    • https://static.s123-cdn-static.com/uploads/4366317/normal_5ffa7a46d8fc2.pdf
    • https://cdn.sqhk.co/vozeseseber/ifgfYhX/savaduzomufonojusotu.pdf
    • http://carishr.com/78360835560cvxk4.pdf
    • http://dalnoboyi.xyz/29402778336o4kuq.pdf
    • https://cdn.sqhk.co/lijusute/ugeSJhd/xoxadewofugu.pdf
    • https://cdn-cms.f-static.net/uploads/4393028/normal_600baf090ee4c.pdf
    • http://recepty-dd.info/epson_event_manager_cannot_connect_to_scanner_windows_10nxj8r.pdf
    • https://cdn.sqhk.co/girolivudafo/69RebgM/supervpn_free_vpn_client_mod_apk.pdf
    • http://toppiksnack.xyz/wemevaxosumipuwemukaz0y5iu.pdf
    • https://cdn.sqhk.co/jukusenefow/kgcVLhd/98529505687.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://584dc5e1-4449-4bca-b3d9-d0e1fa08a972.filesusr.com/ugd/185caa_dfecd8e7e5644bb5ae33fcc9485532f6.pdf?index=true
    • https://57fc24c6-ba7c-430a-bdae-05304608b610.filesusr.com/ugd/bc9c68_effc525866ed485d8df5dc6bfa047e21.pdf?index=true
    • https://9849c7ec-8b19-4b81-9a64-db2537ea7c40.filesusr.com/ugd/97b1c0_0eb4951842e148e48f2afd6faa32edc1.pdf?index=true
    • https://7d6e376e-1ee3-4df5-88c1-8d1511d419f8.filesusr.com/ugd/7dd30d_707f5877ab074f529cfcfae926bf1086.pdf?index=true
    • https://fb075467-9d00-46c6-93ac-2b777f5e584b.filesusr.com/ugd/8bcd66_624ee5749fd74781b93e1b374d1df602.pdf?index=true
    • https://bf68d742-fb98-404a-ab47-1dcf24f7df52.filesusr.com/ugd/83e7fd_cbfb99b90ca841bc92c20a6228c130eb.pdf?index=true
    • https://cb8582fb-ab29-4f13-bfd4-623ca244ab52.filesusr.com/ugd/d61b30_bfa9c9dc2c8d4fa6b56c4c17ea2313c8.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e68d.bin
b3859a16689ab66a088a319f71e6cd24ab5e2bba9854c5878102b6e5e376038e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE68D 5700 bytes
font_01_sfnt_off0000fa00.bin
8d883ffb43fc4530b7079ea5a4cc391ab92e4495f0b45502129ed0fde834ecb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA00 10512 bytes

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