Malicious PDF — malware analysis report

Static analysis result for SHA-256 75237ca25e3567a4…

MALICIOUS

PDF

38.8 KB Created: 2020-10-01 22:36:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b889b60bf713837f4274809c86ed6e42 SHA-1: d4106d3a702532066d8e37e2e6f936effffd9615 SHA-256: 75237ca25e3567a49a803ea974e58243fbcbca28445c220cc64a545946ea3195
94 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL which appears to be a lure for users interested in 'The Witcher 3 interactive map'. No scripts were extracted, but the presence of a malicious URL is a strong indicator of a phishing or redirection attempt.

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://gettraff.ru/strik?keyword=the+witcher+3+interactive+map In PDF document text
    • https://site-1036733.mozfiles.com/files/1036733/84403106810.pdfIn PDF document text
    • https://site-1037235.mozfiles.com/files/1037235/38345818221.pdfIn PDF document text
    • https://site-1036852.mozfiles.com/files/1036852/37015965654.pdfIn PDF document text
    • http://files.lalarukhgroupofhouseboats.com/uploads/1/3/2/7/132740880/7858141.pdfIn PDF document text
    • http://files.senseconstructions.com/uploads/1/3/0/8/130813577/fejoxo-jezan-towexiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0934/2614/files/vafumowogagafomowex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1995/9454/files/82032155276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7544/1318/files/out_of_the_abyss_level_range.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/4205/8652/files/redox_reactions_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9567/4011/files/juvosoxonomulubekedetu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4399/0939/files/dejawobotubozinesozepu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9393/7316/files/66248270093.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_off000059a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59A0 5228 bytes
SHA-256: 40d0efead20740bfc686717273c8234d19f3ee1174382206667fc327c3170573
font_01_sfnt_off00006b5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B5C 10312 bytes
SHA-256: 2d51c3668fef55c90e5110dc2dc5ec1337248fc9682e881fae25875700c766fd