Malicious PDF — malware analysis report

Static analysis result for SHA-256 c93babdd3900b004…

MALICIOUS

PDF

104.2 KB Created: 2021-02-21 04:26:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 659f16677df2fb3b364eafb6053a11fe SHA-1: 0851bc2e843584b98a7060d70f1ec18d2caf93f1 SHA-256: c93babdd3900b004d209d5efebe7b40e807f4e5ef9b1dd63647fcdd3c6c9b62f
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a malicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, references 'chess merit badge requirements 2020', suggesting a lure to entice users to click the embedded URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jottigo.ru/wix?keyword=chess+merit+badge+requirements+2020 PDF link annotation
    • https://cdn.sqhk.co/rowavarop/2PidhbS/nazujivubakavazarakurogu.pdfIn PDF document text
    • http://fiwazurenorin.iblogger.org/platform_bed_frame_full_wood.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449616/normal_5fc798e8ea6a1.pdfIn PDF document text
    • https://cdn.sqhk.co/tixelila/Whescii/zimew.pdfIn PDF document text
    • https://cdn.sqhk.co/dujujema/ibQOTjb/images_iphone_11_pro_max.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465128/normal_5fe5d84585ccf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453732/normal_5ff9fc1796862.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
    • http://xojorefalez.rf.gd/alien_movie_series.pdfIn PDF document text
    • http://sotemapepuko.epizy.com/cambridge_english_key_for_schools.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/android_box_mxq_pro_4k.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/criminal_songs_free_doregama.pdfIn PDF document text
    • http://gepaboveron.epizy.com/light_my_fire_intro_sheet_music.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14532 5540 bytes
SHA-256: dfee463ba0994fae77eebf1d5043aa1dbcd322fe284a484a94782a47676fc2f3
font_01_sfnt_off000157be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157BE 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0001604b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1604B 10744 bytes
SHA-256: 29aabac02669755f0285dea79da6d0f9aba4099d10ffe3ad53316fa428bd9722
font_03_sfnt_off000184dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184DD 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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