Malicious PDF — malware analysis report

Static analysis result for SHA-256 241bc749b1ab7ad7…

MALICIOUS

PDF

42.6 KB Created: 2020-11-04 22:44:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3662cf3b31adfac717893b0488284f51 SHA-1: d78a325f54a34f6f4884baf9c9240eedca6b0b04 SHA-256: 241bc749b1ab7ad755f6bcd15acfb1c5f8b8e507b2969770cda6bbc6f6021062
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://cctraff.ru/123?keyword=what+does+mv+mean+in+text In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388156/normal_5f94ed3fdaa42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380674/normal_5f9ebef2b3929.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427514/normal_5f987cf19724e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369524/normal_5f8a507fd027a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369494/normal_5f892895e8e8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365649/normal_5f88b3b8388a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447467/normal_5fa1534be49bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387814/normal_5f9c8ce47ed90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415055/normal_5fa04ff68ad78.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/c10f2f94-ed23-40f7-b5c4-c16269bc66ac/xijesurodabule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78eb9964-72d2-4726-ba57-039753a8eafe/the_case_for_christianity_cs_lewis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41e55ad6-5e64-4269-831f-c3c8fb0bea69/51671969772.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9f7b33d-9d35-49e5-91c5-14bf04b0fe43/gerewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb6928dc-43a1-4759-97bf-4622a67c0d41/kaxevivupebutavadarop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e51de09-88a1-4048-83f3-a816c2cf89cc/98958569769.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_off00006635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6635 5076 bytes
SHA-256: 6913992abc576b61116c417e434a13736cc8144268b0f9df282ddaa9e0ead257
font_01_sfnt_off00007769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7769 11220 bytes
SHA-256: bfe79ca6bd4ce0e75deb91f6755198350d58d0a4c9a952f17dd3b74382a14c64

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