Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab77076b9ef1add7…

MALICIOUS

PDF

89.4 KB Created: 2021-03-25 05:28:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26bfd49af7aa0c752eba43356a9210d2 SHA-1: 22cd845d265998665d799c33413174858a6601d6 SHA-256: ab77076b9ef1add70ccaeb8e731fcbb7d39ad3553dbe7601f564cd3eea71fecb
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. The presence of a 'Remote-support tool lure' heuristic indicates the document likely attempts to trick the user into installing or running remote access software. The embedded URLs, such as 'https://resalured.ru/strik?utm_term=why+is+my+tablet+so+laggy', likely serve as part of this social engineering tactic, potentially leading to further malicious downloads or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://resalured.ru/strik?utm_term=why+is+my+tablet+so+laggy
    • https://cdn.sqhk.co/pajugeluj/SezGXFa/lyrical_video_maker._ly_video_status_maker_2020.pdf
    • https://cdn.sqhk.co/kusewupudin/VVheFgg/mikafivizasibodagewapet.pdf
    • https://static.s123-cdn-static.com/uploads/4476288/normal_5fefeee84b3a9.pdf
    • http://tuderoba.getenjoyment.net/vegabu.pdf
    • https://cdn-cms.f-static.net/uploads/4478655/normal_6029b1baed3d3.pdf
    • http://sigifiketatoge.22web.org/zemovegikatitobafovob.pdf
    • http://jiwapadenejeza.getenjoyment.net/befug.pdf
    • http://bafutazipavev.iblogger.org/kisah_ashabul_ukhdud.pdf
    • https://cdn-cms.f-static.net/uploads/4478926/normal_60196619c1a7b.pdf
    • https://cdn-cms.f-static.net/uploads/4407795/normal_6034ed4ea4c31.pdf
    • http://vatemuredaxusob.22web.org/tugatuzu.pdf
    • https://cdn-cms.f-static.net/uploads/4422879/normal_5fe6881e42223.pdf
    • http://safijejog.mygamesonline.org/how_to_set_a_plug_in_timer_switch.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bitujiduruv.myartsonline.com/free_biology_project.pdf
    • http://sasibimedijit.rf.gd/trane_air_conditioning_thermostat_manual.pdf
    • http://wikosupiz.epizy.com/34811357342.pdf
    • http://girupesoja.rf.gd/zinawuxofud.pdf
    • https://s3.amazonaws.com/rogugagatuf/painting_canvases_for_sale.pdf
    • https://s3.amazonaws.com/tupofelasujewas/gridex_iv_report.pdf
    • http://dukukanakimazup.epizy.com/fulun.pdf
    • https://s3.amazonaws.com/wavunot/84758691743.pdf
    • 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_off00011ed2.bin
e38d703ab58510be691571f9728451d125ac11c0fc8a11203b5605b5347ae33a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED2 5260 bytes
font_01_sfnt_off000130a4.bin
f54ed2863e604f07a31533ba382f6105f2ca3190a39113dd6ef9db0aa48bad05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130A4 11660 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.