Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1c7bf6f1d897cb6…

MALICIOUS

PDF

107.4 KB Created: 2021-02-20 15:45:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 376f78277a42eadccb0b04183e13fa73 SHA-1: e9aa94870b733a5037d99b4c115fa43880a0c0b5 SHA-256: d1c7bf6f1d897cb64a06223569c5b8000d68e4dc05cdcba9baae7a2a1ae61beb
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 a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were extracted, the presence of a malicious URL and the document's structure suggest it's designed to trick users into visiting a harmful site.

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/wix?keyword=brene+brown+shame+worksheet In PDF document text
    • https://cdn.sqhk.co/disumuneriva/gjCrigj/zoxovusafizukuf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412378/normal_5fcf4c413b236.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424991/normal_6001a1007ecc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459166/normal_6015c2e458f3e.pdfIn PDF document text
    • https://cdn.sqhk.co/kekumumaxow/ojfPjb2/62923345466.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/gUnjhhf/bitlife_prison_escape_8x8_map_4.pdfIn PDF document text
    • https://cdn.sqhk.co/zivunegas/fYwifq9/titan_quest_anniversary_edition_review_ign.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461748/normal_6030a4a18c99c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453142/normal_602f9f06d2a9e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388426/normal_5ff766fb96122.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/dnuiehh/let_s_go_texas_longhorns.pdfIn PDF document text
    • https://cdn.sqhk.co/wadupaxi/iejeijk/rise_up_lyrics_thefatrat_1_hour.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/pegebunov/problem_solving_method_of_teaching_science.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/covering_letter_template_doc.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/jajipomurodawegafo.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/battlefield_1943_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/81180556476.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/myanmar_law_books_free.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000144c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144C9 5240 bytes
SHA-256: 8734d861ff13c88fefc6b834f348e5c8f00f4087f3daa03efcc0b4e173678523
font_01_sfnt_off00015683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15683 16680 bytes
SHA-256: 13e105cf1e9434998cb27ebf36bcf243aa2e66c2cf8d83f973f2c4a7371dfca2
font_02_sfnt_off00018a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A53 16312 bytes
SHA-256: 531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660

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