Malicious PDF — malware analysis report

Static analysis result for SHA-256 40f9be2b27b489db…

MALICIOUS

PDF

68.2 KB Created: 2020-12-30 08:35:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f6b074e62f4520ab5fc96a485d2ee05e SHA-1: b501e7a4c393102554e46e74de60fe8c4cbea59d SHA-256: 40f9be2b27b489dbe455baeb25e6ef819d59db0eb4e81d0e4358f6ddbe87bbbc
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain. ClamAV and an ML classifier flagged this PDF as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains text fragments that appear to be part of a lure, referencing 'I am batman quote'. The presence of an external URI heuristic further supports the malicious intent of directing users to a potentially harmful website.

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://trafftec.ru/123?utm_term=i+am+batman+quote PDF link annotation
    • https://cdn.sqhk.co/mepetiruzi/gchigha/36961647019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367286/normal_5f9a65cd25129.pdfIn PDF document text
    • https://cdn.sqhk.co/bofogarabu/gyhbegj/the_teacher_granny_branny_mode.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457296/normal_5fddfa02bfab6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501364/normal_5fe05f6a9e1d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372085/normal_5fa7a92b41043.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403127/normal_5f9c6ac2ba331.pdfIn PDF document text
    • https://cdn.sqhk.co/lewuravasu/gjfNgin/fm_radio_tuner_for_pc_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371014/normal_5fe084857e2ec.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/xutomoxu/woxakeveravimezuporerifa.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/entrepreneurship_business_plan_project_class_11.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/23137871570.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_off0000d096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD096 4728 bytes
SHA-256: 1886132fa845f1a8159a8b5680cbf12228bbb5d8899404d1c58853b40ed3347a
font_01_sfnt_off0000e09d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09D 10256 bytes
SHA-256: 769f47ddcc8b980fcd50bcbd4514e42a7e782b4796011758589c2b1083cc4e5e