Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7a9c5463c0de971…

MALICIOUS

PDF

81.6 KB Created: 2021-02-27 17:41:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1018deb3f055a8f50008b7c06f74d813 SHA-1: dd9dc9d09f54a392de3a412a90dc6e822b10b961 SHA-256: c7a9c5463c0de971c791c83ca15b57d3c51ed1cb2ee891cf441393b7b5be2082
184 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with keywords related to Acer laptop issues. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious infrastructure, likely for phishing or malware delivery.

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
  • 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://dafemum.ru/wb?keyword=acer%20laptop%20keyboard%20not%20working%20windows%207 In PDF document text
    • http://fefiwizam.sportsontheweb.net/why_is_my_phone_saying_no_network_registered.pdfIn PDF document text
    • https://sezebotari.weebly.com/uploads/1/3/1/6/131636698/1671950.pdfIn PDF document text
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/1959716.pdfIn PDF document text
    • http://rilotelexewobos.iblogger.org/21294205516.pdfIn PDF document text
    • http://vobefoli.iblogger.org/mufejemal.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/61102762199.pdfIn PDF document text
    • http://wivaserana.mywebcommunity.org/how_to_clean_bissell_proheat_2x_revolution_brushes.pdfIn PDF document text
    • http://kazimibi.getenjoyment.net/pujewagonenogofogoweru.pdfIn PDF document text
    • http://tafelutij.22web.org/immigration_australia_questions_answers.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/nokowolawolivadavunawefi.pdfIn PDF document text
    • https://nazokorebuvawir.weebly.com/uploads/1/3/0/7/130776058/safafarel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bufexa/78283656371.pdfIn PDF document text
    • http://zagofij.onlinewebshop.net/dipigojilebipi.pdfIn PDF document text
    • http://vavogave.rf.gd/mysql_server_installation_guide.pdfIn PDF document text
    • http://zomimek.epizy.com/bones_episode_guide_season_6.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/90198008987.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/68292224899.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/calories_in_dunkin_mocha_swirl_pump.pdfIn PDF document text
    • http://laboluvimaniraf.epizy.com/13733672584.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/zegidef.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF437 5496 bytes
SHA-256: df18ed5e7f35c41a095f4d05875fef6f93001529cb53683b71d80e1abd1be9eb
font_01_sfnt_off00010706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10706 10300 bytes
SHA-256: 2f8cad10e70e031259ad4b81c09f07c08dbbcdf051d0721fbfde0e1584661645
font_02_sfnt_off00012a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A4E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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