Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f55dedebbe0d0b9…

MALICIOUS

PDF

85.6 KB Created: 2021-02-27 07:15:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a789c31a567e8a7b45391824985d537e SHA-1: 40ed30ff4c09d90238264b430d237dc50ce05fea SHA-256: 7f55dedebbe0d0b94d71317daef28aac453afa61c6d759ae9f44559d3ba508f6
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to a URL that appears to be a lure for movie content. The ML classifier and ClamAV also flagged this PDF as malicious. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/wix?keyword=star+wars+the+rise+of+skywalker+123movies.net In PDF document text
    • https://static.s123-cdn-static.com/uploads/4466411/normal_600252e833191.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458829/normal_5fcb228b3b95a.pdfIn PDF document text
    • https://cdn.sqhk.co/jasowipe/lsihjiB/cars_3_toys_lightning_mcqueen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383792/normal_5fc64876baa29.pdfIn PDF document text
    • https://cdn.sqhk.co/karopepagu/umicxhb/get_likes_on_tiktok.pdfIn PDF document text
    • https://cdn.sqhk.co/polopomoset/QhdAojj/my_boy_emulator_games_yugioh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493876/normal_5fec41e5e90b9.pdfIn PDF document text
    • https://cdn.sqhk.co/lorotukogof/NoAjggi/62005646547.pdfIn PDF document text
    • https://cdn.sqhk.co/fesakesovoka/cdMcL8C/knife_dash_mod_apk_1._1._60.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/fadedosi/oral_lichen_planus_erosive_type_case_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/cultura_chavin_formas_de_ceramica.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/soxesiriwujosokigarofezo.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/cloze_passage_worksheets_for_grade_6.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/46669586617.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/social_media_trends_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/does_mal_die_in_descendants_3.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_off00011122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11122 5808 bytes
SHA-256: 65b05ed1da372ad99dba7b194f2e7595937f05b31e93571940c138303d298830
font_01_sfnt_off000124e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E4 10504 bytes
SHA-256: 3d3cf8d4e96d92eed099ecf4bf5dccbf4186dfb70845e6f60b68201de8e8eda1

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