Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d9a0840aedbe74b…

MALICIOUS

PDF

43.4 KB Created: 2020-11-05 18:43:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 669324f6de4ee9345bff037ce19714c2 SHA-1: 4bfb962550eec236cbc9a904cb478248016c6859 SHA-256: 3d9a0840aedbe74baf00d4cbf460dae0f0f1126b84a85373e33e05709689c4c5
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, disguised with keywords related to a game. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL indicates an attempt to redirect the user to a harmful site, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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://traffking.ru/123?keyword=chaos+faction+2+unblocked+66 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_5f9b963ad14a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379960/normal_5f9b54d62dc9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382965/normal_5f9af42f1d5b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383566/normal_5f8f5940d98f2.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/pibabopuduj/70277005656.pdfIn PDF document text
    • https://s3.amazonaws.com/jaburirarov/back_to_basics_aa_book.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/the_princeton_review_mcat_3rd_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/8th_grade_us_history_staar_study_packet_key.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/english_story_books_with_tamil_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/gujerarutavevet.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/61972448542.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/kiwumawaxamuxagelinedazo.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/32005243286.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/ropuwuj.pdfIn PDF document text
    • https://s3.amazonaws.com/wepeliniru/vomepigoxesibifomapi.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/the_crucible_review_crossword_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/vepawadem.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_off0000560e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x560E 5408 bytes
SHA-256: 04633531f63f7195f6eec5dea17c24f5cdb1b41f9a865d950f53244b60f9b4f3
font_01_sfnt_off0000686d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x686D 9952 bytes
SHA-256: bafb26dab5b56a661af703986bea806b1081d5cb52b6ebced66397d398ae5804
font_02_sfnt_off00008aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA8 16296 bytes
SHA-256: 15128285344048d76b584a6587ab2ccb2c75eee889948d4c665368cae9e92c8f

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