Malicious PDF — malware analysis report

Static analysis result for SHA-256 a64cf23c2c396db3…

MALICIOUS

PDF

49.4 KB Created: 2020-11-03 02:03:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2182f58cc0809ded348cfa665a97bdf8 SHA-1: 21a756344c36ed60154d30f9ca78024c6102a768 SHA-256: a64cf23c2c396db32d34103e82592c3d0082a0199a73fbf5f7688990c87707af
102 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ggtraff.ru/strik?keyword=my+hero+academia+season+1+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420239/normal_5fa0966eb4a53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378846/normal_5f9599275c136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386842/normal_5f903b23b236e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366395/normal_5f9357f60bc82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413575/normal_5f97892dc6a45.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3726/0966/files/51342532060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/8742/8257/files/ration_card_form_odisha.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/blank_tournament_bracket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d982f51-e7ce-47c1-b628-58ba638e9018/15147254413.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2137/5387/files/st_francis_chapel_boston.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/awards_and_honours_2018_india.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3923/4967/files/frigidaire_electric_stove_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eec50720-681e-44e7-9428-3d53f265af6c/womigusezovemaguloretix.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/buddhism_and_hinduism_similarities_essay.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6078 4256 bytes
SHA-256: 89a70200b0e700d4c23cf61e86d76165dc37c52c9f88afa231b907681df840de
font_01_sfnt_off00006f7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7E 5140 bytes
SHA-256: 3556bf7d2b7e6a3476a8d3489f5a7a908bba3976af58e5aafd920cbaa9ce9e0c
font_02_sfnt_off000080df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80DF 11816 bytes
SHA-256: 058cff7c689eb6620cfae80eab2ba7f8c0c7ed57355305fb481a1c71284db8b7
font_03_sfnt_off0000a8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8A0 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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