Malicious PDF — malware analysis report

Static analysis result for SHA-256 4692b8bea06e3dca…

MALICIOUS

PDF

78.8 KB Created: 2021-01-11 15:42:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 86a8181329e078c5ffde06b001e7088e SHA-1: 9a3849fd1fe8696b087a834f0743299b8b22a7ab SHA-256: 4692b8bea06e3dca6a5a896a22e7a0a588370d6e59119034562201f897a25926
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely intended to redirect the user to a malicious site. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'Korean war pictures in color', suggesting a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://traffnew.ru/123?utm_term=korean+war+pictures+in+color PDF link annotation
    • https://site-1176476.mozfiles.com/files/1176476/battle_warship_naval_empire_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/ic78he0/30861251937.pdfIn PDF document text
    • https://cdn.sqhk.co/masunidupag/hjgehfM/warfare_incorporated_unblocked.pdfIn PDF document text
    • https://site-1200104.mozfiles.com/files/1200104/80258541544.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374540/normal_5f8a1bda9cd9a.pdfIn PDF document text
    • https://site-1172874.mozfiles.com/files/1172874/minecraft_2b2t_bedrock_comet.pdfIn PDF document text
    • https://cdn.sqhk.co/dimumaneda/gehejag/71581006288.pdfIn PDF document text
    • https://cdn.sqhk.co/vigesiji/nibgi2B/wallpapers_maker_for_battle_royale_all_skins.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/mcdonalds_app_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/teacher_newsletter_templates_word.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/assassin_s_creed_identity_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/11367692995.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/articulaciones_de_los_huesos.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/13936117109.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_off0000f841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF841 4988 bytes
SHA-256: e643810bc0bdb46595217a4bac3c15fcd47d7c6d60d76564eccfff5afc857624
font_01_sfnt_off0001095d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095D 10852 bytes
SHA-256: a5a308b59a3817b2421faa2ac7e2b34e8c141b918d1139170363f17e8ab72028

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