Malicious PDF — malware analysis report

Static analysis result for SHA-256 63f44a188e8b24d2…

MALICIOUS

PDF

77.2 KB Created: 2020-12-10 11:57:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e8ee0354bf3440d77c39d7759e28a7ad SHA-1: 9175e95df5319c676a55b02620bdd7edbfd9dc91 SHA-256: 63f44a188e8b24d2dca639c02e8a96caec1716ab6e9cc2c632ae475abe89f379
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffmen.ru/123?utm_term=marine+interdiction+agent+pay In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374360/normal_5f97e7830c7de.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/68250506-2dcc-439e-bdfd-1c7dccf5356f/kitchenaid_food_processor_attachment_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac533b69-e8eb-4933-a692-860a769c6d26/gulf_coast_property_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f05e86b4-c5d9-4bdd-b793-6e1b3153966b/12v_to_5v_converter_raspberry_pi.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/the_reader_bernhard_schlink.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69f92fc7-33a6-4971-bf9f-b7e98f14a25b/the_pythagorean_theorem_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8344c2e2-ef8c-4671-bdba-f96bb36feb84/plastic_candy_jars_for_candy_buffet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97bb9d0b-0369-475e-b064-1f8247cd4aff/32001736112.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/arabic_nationalities_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/82120288725.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/pipazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb8a0f2d-7bfc-46b2-9aa5-bbb8e8210c8c/64_team_double_elimination_bracket.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/ccf_medical_full_form.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_off0000de93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE93 5136 bytes
SHA-256: febf84e976170f0de56334c1d62c074e375f3e8c30ae59832c0b027f94068b45
font_01_sfnt_off0000f034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF034 10228 bytes
SHA-256: 1a14624ea3588b1366b334c22512af342a14d9e762bb0350264e20c1ceabf772
font_02_sfnt_off0001137a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1137A 16068 bytes
SHA-256: f937ef771f1427dbe211159ec18143766092b1b684665b90a2f47364d5c4783f

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