Malicious PDF — malware analysis report

Static analysis result for SHA-256 38938acf991f328f…

MALICIOUS

PDF

87.5 KB Created: 2020-12-28 08:43:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ea83eaee548036dee2f8d9e86899a099 SHA-1: 76ced2d394367a2f6ba2afb1f8a1b9a427241d98 SHA-256: 38938acf991f328f31d9bb5a2cfb1edb18a4b5dc9371375946495769c8fbe201
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/strik?utm_term=minecraft+ben+10+vanilla+mod+v2+download'. This URL is presented as a download for a Minecraft mod, indicating a phishing or social engineering lure. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • 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://ggtraff.ru/strik?utm_term=minecraft+ben+10+vanilla+mod+v2+download In PDF document text
    • https://cdn.sqhk.co/dodazija/qPhmidh/zeropin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389586/normal_5f9898f14222d.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/defipedibe/carroll_county_nh_registry_of_deeds_fees.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea864f93-16f9-470a-a450-310238de6692/nimijinowaj.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/elliptical_clauses_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/sopamomorutan.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/guwezuxavujidugoko.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/ausgehende_anrufe_blockieren_android.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/bofimivifegigim.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/74344355380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/446450b1-a223-41d0-a38a-0a71b2a88ce4/49612564654.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bc78502-aaaf-42d3-8075-e23a340bf14f/minofip.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/builders_profile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edb145fe-7078-4d99-8e3c-385d2ecc1f09/wowaga.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f44a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44A 5400 bytes
SHA-256: bba2b93159c81fc32437ce9542495906506b3d66f9e7326ed11fa9dd4eedb3e1
font_01_sfnt_off000106a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A3 10848 bytes
SHA-256: 0a8c527b24ce463a169e8d2302b3ffdf9d64d5efd4b70c4f5c233a51e12f46d7
font_02_sfnt_off00012bf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BF3 16064 bytes
SHA-256: 8ce0575abc6f686af3c1393089841c21814f5c4838d5adbe0d649219e58da802
font_03_sfnt_off00014089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14089 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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