Malicious PDF — malware analysis report

Static analysis result for SHA-256 80f77fb823473eb5…

MALICIOUS

PDF

86.7 KB Created: 2021-03-01 10:52:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: c46e475339dd4e6087a3883e9d2a51f5 SHA-1: 26de0cb9b6756428a084046ffa6166915d90770d SHA-256: 80f77fb823473eb5dfd6aaf35fdb7031b163265e974f0eb144d5f8fc5f6af34e
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://maypoin.ru/award?keyword=html+change+label+font+color', which is likely used to deliver a secondary payload or conduct phishing. The document body, though heavily obfuscated, suggests it is attempting to masquerade as a legitimate document.

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://maypoin.ru/award?keyword=html+change+label+font+color PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4392871/normal_5ffa34783255b.pdfIn PDF document text
    • http://help-bluebadgecustomer.com/aarya_movie_ringtones_free593k4.pdfIn PDF document text
    • http://summ-ita.space/853077700568vabu.pdfIn PDF document text
    • http://krokoboko6.xyz/78202595719cf9uv.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvepiwedo/jcgfj5v/step_2_ball_buddies_adventure_centertm.pdfIn PDF document text
    • http://lunesygets.xyz/darling_in_the_franxx_plothrb93.pdfIn PDF document text
    • http://7lessons.site/348423374645ji5b.pdfIn PDF document text
    • http://tublitalia.fun/2174137732643ti3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371010/normal_5ff3878880f26.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/bomifabipi/asterix_and_obelix_full_game_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/komobabiwifelito.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/whats_a_project_x_party.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/cheadle_hulme_high_school_sixth_form.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/abc_australia_news_reporters_female.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/systems_of_linear_equations_graphing_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/vomoveduzaser.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_off00010b39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B39 5216 bytes
SHA-256: 1be02b34fd05deda2d7453da1a96e9517c79c953ce34ac4195b9088107dabeac
font_01_sfnt_off00011ccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CCF 15668 bytes
SHA-256: f9d8a44c05e6c9b5f629ef71c9699fc90fa8abf81169cdc918a02e0fbae594ed

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