Malicious PDF — malware analysis report

Static analysis result for SHA-256 57719e9698c8e56f…

MALICIOUS

PDF

77.7 KB Created: 2021-02-27 03:41:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d0d38c34ce3ce997f6a0f0da13cfb165 SHA-1: 8dd9a00637e01c6b0b3db24275c0617a83f86bae SHA-256: 57719e9698c8e56fd6bddabb1d79070203fbc0c1afc82a5553073b3f6d0a1e40
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'nipisod.ru', which is likely a phishing or malware distribution site. The PDF structure also shows signs of manipulation with duplicate object bodies. No scripts were extracted, but the presence of external URIs suggests an attempt to redirect the user to a malicious resource.

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://nipisod.ru/strik?utm_term=arduino+mega+pins+pwm PDF link annotation
    • https://cdn.sqhk.co/zebenane/Cgdjigi/49987000708.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebililofo/iRxhg9s/download_tornado_3d_live_wallpaper.pdfIn PDF document text
    • https://cdn.sqhk.co/nuduniguwufo/o2I1ijR/93078420208.pdfIn PDF document text
    • https://cdn.sqhk.co/jixuvepabu/ahbZ3jj/youtube_star_wars_asteroid_field.pdfIn PDF document text
    • http://predouche.xyz/vobimepexabenuxopexibc4an0.pdfIn PDF document text
    • https://cdn.sqhk.co/dufelogaruf/jijivSd/free_printable_spelling_tic_tac_toe_sheets.pdfIn PDF document text
    • https://cdn.sqhk.co/bezakebijuk/hfa267E/magic_tiles_3_mod_apk_all_unlocked.pdfIn PDF document text
    • https://cdn.sqhk.co/nifodotiriru/eLgeJhj/octopus_drawing_color.pdfIn PDF document text
    • http://gromstroy.com/fovokodevopajatezogemigs9rhn.pdfIn PDF document text
    • http://piredvizhnik.com/17003403783xytj3.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/dutuzanob/battlelands_royale_windows_7.pdfIn PDF document text
    • http://bosirizowu.rf.gd/78128357603.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/raghuvaran_btech_movie_songs_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/73509476483.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/pronunciation_dictionary_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/weather_report_bayreuth_germany.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/happy_endings_movie_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/kesidapefividuxiw.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/dispute_resolution_process_template.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_off0000f3c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C7 5328 bytes
SHA-256: 44e8e79328604814db7aa301eca2085ae34abec9086ade6efd439a3b025dad02
font_01_sfnt_off000105db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DB 10544 bytes
SHA-256: ad90a79303b5d82c8d7300b4036bb202fd21d3689eb387264aad6772a32543b2

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