Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cec5f3e554dbbf9…

MALICIOUS

PDF

82.8 KB Created: 2021-02-25 00:02:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 602976e8189181114dca0637a05cf99c SHA-1: 8409d4224842dd68bd2b020b4e462986fef1695a SHA-256: 6cec5f3e554dbbf99a01947cf32a6eb200ba58c843fe6a822ffc33477bb82ba3
96 Risk Score

Malware Insights

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

The file is a PDF containing obfuscated text and an embedded URI pointing to a suspicious domain. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The presence of multiple unknown reputation URLs further supports a phishing or malicious content delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/123?utm_term=what+is+mead%2527s+theory+of+self PDF link annotation
    • http://lnstagram-verifedbadge.com/why_is_wii_sports_so_expensive9cf3f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464700/normal_5fddd01b90fea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366646/normal_5ffbdb5645cf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420245/normal_5fda252def280.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_5fd9fbfe5b813.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422894/normal_601fa0c459f30.pdfIn PDF document text
    • http://runmasten.online/what_is_seasonal_patternymghv.pdfIn PDF document text
    • http://topshops.website/cebs_guidelines_on_outsourcing_deutsch7pxh9.pdfIn PDF document text
    • http://collegegraduatecentraldating.com/how_do_you_do_conflict_resolutionyc62q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406812/normal_5fefd08d30463.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493549/normal_5ff33c0fdcae9.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/jidosatikim/nuladufegabifelitaxafat.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/dujozanagopijijedo.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/turn_off_pop_up_blocker_chrome_android.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/great_fairy_fountain_viola_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/fidovi.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/learnzillion_guidebook_2._0.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/28976052754.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_off0000fa79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA79 4976 bytes
SHA-256: bcead909bade00e4370ef7fbc6b413a151cd009b7f6d3cc014acdc5e578882f1
font_01_sfnt_off00010b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B76 10072 bytes
SHA-256: dc2f484666d8a220467f686d952e1cc9a4c3b44b4cc5caf66fd114c6d9e2a8b2
font_02_sfnt_off00012e01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E01 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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