Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0618ee53623d19d…

MALICIOUS

PDF

75.6 KB Created: 2021-03-01 07:07:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 839bfefd5f23338d1b57632af15a0ef8 SHA-1: 8a4018f2e5c41a81dee0fba349d2103cf6bd969b SHA-256: f0618ee53623d19da46732b329e4441c8628219b84274cbd786de9f4b4ba0409
166 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, and includes an explicit instruction to disable security software, which is a strong indicator of malicious intent. While no scripts were directly extracted, the presence of embedded URLs and the security bypass instruction suggest it's designed to lure the user into a compromised state, likely leading to further exploitation or credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://fokemale.ru/123?utm_term=windows+server+2012+r2+iso+direct+link PDF link annotation
    • http://italia-doc.fun/air_control_lite_full_version_apk9x79f.pdfIn PDF document text
    • http://haustova.com/nugusanoxoxixabolebawu4kcy.pdfIn PDF document text
    • http://pomevufe.22web.org/78405995264.pdfIn PDF document text
    • http://mumavanetadasos.22web.org/grade_1_writing_worksheets_australia.pdfIn PDF document text
    • http://xemuzaxu.22web.org/2753849569.pdfIn PDF document text
    • http://slampochka.ru/jquery_ajax_complete_tutorialteqt8.pdfIn PDF document text
    • http://yachts-4-sale.com/80434176130jhwzb.pdfIn PDF document text
    • http://familyit.pro/lambda_school_precourse_answerszh3r7.pdfIn PDF document text
    • http://mirijesuwakug.sportsontheweb.net/94383983469.pdfIn PDF document text
    • http://bluetea.space/email_writing_template_eslca07d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gonaviniji.epizy.com/piriformis_muscle_spasm_icd_10.pdfIn PDF document text
    • http://wolaniloko.epizy.com/fixififelibavusigomisudul.pdfIn PDF document text
    • http://posijibanif.epizy.com/98147591219.pdfIn PDF document text
    • http://varoniwarovez.rf.gd/momobugapuke.pdfIn PDF document text
    • http://zavufomagug.rf.gd/teside.pdfIn PDF document text
    • http://petojijoxura.onlinewebshop.net/soleus_air_10_000_btu_portable_air_conditioner_manual.pdfIn PDF document text
    • http://dikawixum.epizy.com/wadaranotujunememo.pdfIn PDF document text
    • http://zutawatupasexap.rf.gd/15823793960.pdfIn PDF document text
    • http://mimarenunev.rf.gd/89987255186.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_off0000ebf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF4 5276 bytes
SHA-256: d54068a8bf4023cb97daf166eec6776bbc5582e47d6d3e09e718d2deadd34f6d
font_01_sfnt_off0000fe22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE22 10056 bytes
SHA-256: 7c6c005ec4029d6b9194b3f3690e6b87b95ab76d523ba6becac73a56ee3e9a77

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