Malicious PDF — malware analysis report

Static analysis result for SHA-256 043e486063ae0b50…

MALICIOUS

PDF

76.1 KB Created: 2021-01-31 01:55:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e3a53fac1819573842378ba42f6bbafa SHA-1: 6007e81cf5f009a36c957d2723668dd2ca8df12c SHA-256: 043e486063ae0b50bbe687a779d9e8f804e7de9118949666504e67e4595e8fdf
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. An external URI pointing to 'maypoin.ru' was extracted, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'Qt', indicating it was likely generated programmatically to host the malicious URL.

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/aws?utm_term=inline+style+sheet+example+in+w3schools PDF link annotation
    • http://wezugeviliwibu.iblogger.org/18253366545.pdfIn PDF document text
    • https://cdn.sqhk.co/jojipimuve/DEszjg5/11502287969.pdfIn PDF document text
    • http://zolekumosex.iblogger.org/42385616555.pdfIn PDF document text
    • http://lalozakuren.66ghz.com/rarugivi.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/lomiwexuva/ppt_template_free_medical.pdfIn PDF document text
    • http://sedobuxekazadi.rf.gd/chamma_chamma_full_hd_video_1080p.pdfIn PDF document text
    • http://xubaforan.epizy.com/22912406070.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/bejelekebo.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/17669280857.pdfIn PDF document text
    • http://nalumilejoburo.rf.gd/all_falls_down_piano_sheet_musescore.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/64876211931.pdfIn PDF document text
    • http://pixoralozod.epizy.com/nowozetupugut.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/15848608684.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/waterproof_membrane_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/ms_word_shipping_label_template.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/cafe_racer_mod_apk_ios.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_off0000e2d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D8 5440 bytes
SHA-256: b30986285f1d1fb989e901b878a829c05f39d40b096d91f1f90a5121d024dd23
font_01_sfnt_off0000f54d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54D 14496 bytes
SHA-256: aa4e5b5928d2caf0b81b78f2819ed33545f651b269b8276a202d625e6cf36719

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