Malicious PDF — malware analysis report

Static analysis result for SHA-256 e543013bb467c122…

MALICIOUS

PDF

77.6 KB Created: 2021-02-24 16:41:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 532aa5cbe5022bc5fcb965d42e79138b SHA-1: f7f3c9c9803ef4d98eee041db06b0723d5320a02 SHA-256: e543013bb467c1225b354cef5f2d353aaadef8500fc4d2547f0a1818219cf4fa
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or malware distribution attempt. The 'SE_CALLBACK_LURE' heuristic indicates the document may be designed to trick users into calling a fraudulent support number.

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://bologen.ru/wb?keyword=2005%20cadillac%20cts%20abs%20light PDF link annotation
    • https://cdn.sqhk.co/zurefaxenov/7jc2gjL/gevuliwexuram.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454171/normal_602d28042affc.pdfIn PDF document text
    • https://mexasazage.weebly.com/uploads/1/3/4/5/134513067/zoxomu.pdfIn PDF document text
    • http://turexizizo.22web.org/dell_latitude_e6410_a09_bios_upgrade.pdfIn PDF document text
    • https://cdn.sqhk.co/vomisape/ijgcjis/jadeka.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416125/normal_6003822ee58bd.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/kujeso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421764/normal_602e7cf9bbb77.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415739/normal_5fcc44685ccd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392650/normal_600e37eca5262.pdfIn PDF document text
    • https://tusogakesi.weebly.com/uploads/1/3/4/6/134661960/9475050.pdfIn PDF document text
    • http://nejevefivi.mypressonline.com/what_does_yellow_light_mean_on_belkin_wifi_extender.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/jcgdjjK/35076332128.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404753/normal_5fce47fb3842e.pdfIn PDF document text
    • https://cdn.sqhk.co/gabazumad/jiiggR7/22945448256.pdfIn PDF document text
    • https://peliretoru.weebly.com/uploads/1/3/3/9/133997281/409d3fc946.pdfIn PDF document text
    • http://saxobupazes.sportsontheweb.net/28917051320.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://temitugefowe.epizy.com/kudobizikadidatuvilor.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_off0000eccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCB 5548 bytes
SHA-256: 80a04c6b089c858f18c5848ebe13aa956196f2beb36da922539028fc7347b0d7
font_01_sfnt_off0000ffa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA5 11596 bytes
SHA-256: 32a2ad232b5256ad01d7144eba1a4a4c20f2a08c7432771faa7904c4a69beebe

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