Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c5c086a3abfb63f…

MALICIOUS

PDF

53.1 KB Created: 2020-11-01 02:09:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b9ea0002aac8138b8a10baf9b3b49e42 SHA-1: beaa6d17aa5ef77a832b3af54c6b17abce4ca55c SHA-256: 5c5c086a3abfb63f6e094543c87c7c238306d5d9f97300204d066f580ecebfa3
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 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://ggtraff.ru/strik?keyword=august+2018+regents+answers+geometry In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388824/normal_5f9685403c2ca.pdfIn PDF document text
    • https://dawugagulinejud.weebly.com/uploads/1/3/4/3/134368664/davomugijanavefu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369935/normal_5f88bd3c1ec85.pdfIn PDF document text
    • https://jemajodelevo.weebly.com/uploads/1/3/4/3/134394711/0aeed263ba5af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369762/normal_5f883a0a3f6fc.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/1/0495/7424/8600/files/69031763015.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/xasunuporatujunuxoko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/9177/5654/files/netiwumi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8026/7961/files/perimeter_of_a_half_circle_equation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c55fe2b6-f701-46ca-8c06-725b6f118023/local_winds_are_best_defined_as.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbb0919b-301a-40f1-9d3d-da1a3a483037/91739812537.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/9716/3423/files/zajuluwarujinedaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/0127/1215/files/35813164838.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_off0000782b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x782B 5676 bytes
SHA-256: 5c1bfa80b186fb0dc480cfe6e54665ecc2099b1dee2a1cd59b635f6c9cf9451a
font_01_sfnt_off00008b8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B8E 11324 bytes
SHA-256: 853c5b08a2dd4e1ad4e457f9b77b433e91fd0c0a10a36401bcf50bcda1611a3d
font_02_sfnt_off0000b246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB246 16072 bytes
SHA-256: 4ce97752c8d1ed0b0302a1507788019c6b738cc3ee96ca273f61f92c287db7cd

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