Malicious PDF — malware analysis report

Static analysis result for SHA-256 648837f4c486b685…

MALICIOUS

PDF

75.0 KB Created: 2021-02-15 21:56:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 724cf255e2deb3659002bccedb904079 SHA-1: d159ce82edcd6ccda8efa89d5d7310e7f528ded7 SHA-256: 648837f4c486b6858a88c65e76311d007c63796e30da52e12119b73b74b9ab15
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a compromised site. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a common attack pattern for distributing malicious content.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/strik?utm_term=which+is+the+best+love+story+movie+in+tamil In PDF document text
    • https://cdn.sqhk.co/sejarepezibo/ZeZhg1C/empires_and_allies_forum_zynga.pdfIn PDF document text
    • https://cdn.sqhk.co/fofodafexadu/yhjVihd/gebikenineje.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/hjHgihf/screen_recorder_video_recorder_game_recorder_download.pdfIn PDF document text
    • https://cdn.sqhk.co/movumatoz/QibyjMg/75513907928.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/gpjdhfZ/paromafazolede.pdfIn PDF document text
    • https://cdn.sqhk.co/wofunukasu/igsig9y/tuning_club_online_mod_apk_rexdl.pdfIn PDF document text
    • https://cdn.sqhk.co/lamijaluxeso/0gb0enH/united_methodist_church_shona_hymn_book.pdfIn PDF document text
    • https://cdn.sqhk.co/nobutowug/agcijgd/hitch_snow_blade.pdfIn PDF document text
    • https://cdn.sqhk.co/vojofarakiva/iggiNji/ketivepidodunitulepinat.pdfIn PDF document text
    • http://eslife.pro/beginning_consonant_blends_worksheets_free8uvxu.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/palevijuj/bosch_classixx_5._5_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/biblical_hebrew_vocabulary_made_easy.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/guide_gravures_verres_progressifs_essilor.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/attack_on_titan_theme.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/bwv_974_piano_sheet_music.pdfIn PDF document text
    • http://desakoda.rf.gd/kabevuworewopekovu.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/insiders_guide_to_paris_hotels.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_off0000e814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE814 5356 bytes
SHA-256: 368ca273dcdf595a6331bd010c8591e9787b6bf66f377749efc26998d9c96da4
font_01_sfnt_off0000fa31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA31 10724 bytes
SHA-256: 0a07f1df84dc30bc94d5770cf673563076c8e51758c07fd2f240892c64f3f6fa

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