Malicious PDF — malware analysis report

Static analysis result for SHA-256 b18926aa50673e5d…

MALICIOUS

PDF

38.8 KB Created: 2020-10-29 04:32:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5c089d97570e6a7d6c0ce14221141a15 SHA-1: d87b697993bbc6be9a8dc11e6e0924cfdec940ea SHA-256: b18926aa50673e5d48714dbfea30e1dc0a25c2d6ae3dae1f19ada71f3a70d32b
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/123?keyword=air+rifle+targets In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5f896d5ec8132.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366331/normal_5f8c0759b986a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387701/normal_5f8f5c3992012.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366381/normal_5f8859fa4dc7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375357/normal_5f91738e37470.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412173/normal_5f93574d06836.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/1/0266/7846/0590/files/mefawapawejeragalokuda.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/gesezebosab.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/rains_of_castamere_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e43c8f77-4379-46fe-9f63-6e38324f80f1/18462115561.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5805c407-c4e5-4424-bdd3-f5cc0b8db853/89449061141.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d7a2b23-a78c-4d83-bccf-c4346455028b/60892458943.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8026/1025/files/4828553973.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8304/5293/files/i_am_paul_walker_tv_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/acr_birads_atlas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5d5bf62-dab0-4f2e-92b6-90ddfdcccbe3/noxefamokebil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6773/6225/files/paradise_lost_poem_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2644/8023/files/cuanto_mide_una_cancha_de_basquet_escolar.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_off000057ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57CA 4924 bytes
SHA-256: dc749a37c02771ab6d1e865848bffb6e052188636909fd1b55bbbc10e7c87a5d
font_01_sfnt_off0000689e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x689E 11068 bytes
SHA-256: d1dc46f1276ec984c803459952f15d7509a88e089a20f52c3859f98011e2c49e

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