Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cbe84971f51434f…

MALICIOUS

PDF

79.5 KB Created: 2021-03-02 21:59:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5df925fd60aa3cc31530425fb180aaa3 SHA-1: 39d8bffdccbeb4d244570b8ac17b762e6d6f2cb5 SHA-256: 0cbe84971f51434f42604fa5810aa811c89ffe2127cebe6863f8bed11c16770b
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, which is disguised with text related to installing a motion detector light. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded malicious URL suggest it's designed to redirect users to a phishing or malware distribution 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/wb?keyword=how%20to%20install%20a%20motion%20detector%20light In PDF document text
    • https://cdn-cms.f-static.net/uploads/4498997/normal_5fdb3941de212.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408004/normal_60005caa8aab3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381756/normal_6007a6ca5f37c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385010/normal_5feb940ecb19f.pdfIn PDF document text
    • http://sokolov.fun/exercicios_barroco_e_arcadismop4x0g.pdfIn PDF document text
    • http://macsk.space/air_force_question_paper_group_y2ea2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374852/normal_5fd6649a5b103.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/regovadeje/69541837650.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/dylan_cozens_nhl_scouting_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/handwriting_alphabet_letters_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/aukey_dash_cam_dr02_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/pasoviv.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/62076754149.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/rewebivofabipewetila.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/gdp_calculation_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/stylish_letter_k_images.pdfIn PDF document text
    • http://lutubipejor.rf.gd/80093085333.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/70544764155.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_off0000f988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF988 5408 bytes
SHA-256: 0b5bd58c6b6f026afd2440520bb71250910279408e3b0329842b14de7d51a777
font_01_sfnt_off00010bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC6 10896 bytes
SHA-256: 846a675bfb84366d261a75c0fd28abcec509976cd7da5586a600707dbb2c8391

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