Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb61fcf02e4c5501…

MALICIOUS

PDF

99.2 KB Created: 2021-02-20 23:11:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 29a23a41d4a8cdc5d94e29a9b5382fd0 SHA-1: 387619c346e36607e6d1c4505669f8a6423c54ee SHA-256: cb61fcf02e4c55016d10549e63508c5fb2dbc82a9de93a3c59b5757dc03b043f
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://maypoin.ru/123?utm_term=the+son+of+neptune+chapter+2+summary', which is likely a phishing lure. The document body, though heavily obfuscated, suggests a deceptive title related to 'The son of neptune chapter 2 summary'. No scripts were extracted, but the presence of a malicious URI and the document's classification strongly indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/123?utm_term=the+son+of+neptune+chapter+2+summary PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379474/normal_5ff1630bce43a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406170/normal_5feb24da5db1e.pdfIn PDF document text
    • https://cdn.sqhk.co/xedaberetaj/gjagnW8/english_short_stories_books_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wepunajexiju/V41jijd/59937152708.pdfIn PDF document text
    • https://cdn.sqhk.co/vinasujitupe/hbcjfRt/monkey_go_happy_ninja_hunt_2_flash_game.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/bRgh4jc/stickman_world_war_2_games_xbox_360.pdfIn PDF document text
    • https://cdn.sqhk.co/jimavidozeze/euHibha/criminal_case_search_cook_county.pdfIn PDF document text
    • https://cdn.sqhk.co/novupezezis/gciajs5/top_rock_songs_of_the_80s_and_90s.pdfIn PDF document text
    • https://cdn.sqhk.co/vozaxodep/jCcgdGz/merchant_ship_us_history_definition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493209/normal_5fd2fe536dd6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403947/normal_5fc69da18e0b2.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/petubapizo/spark_python_vs_scala_performance.pdfIn PDF document text
    • http://gidubivej.rf.gd/tukoxonilosetexi.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_off000149ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149CA 5408 bytes
SHA-256: 96762fa61c6efea487c49f6038fc798a3458a60357b2170b1637f09f4c99ee02
font_01_sfnt_off00015c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C0B 10768 bytes
SHA-256: d33a0df14e8860e6d3d9a23e06fe18ee4d06f9787feea69947549251ea07bab9