Malicious PDF — malware analysis report

Static analysis result for SHA-256 366a5914c8896508…

MALICIOUS

PDF

51.1 KB Created: 2020-10-29 17:40:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e10743981be44bcbf417709025f9c59f SHA-1: d2fe976e964a3514b5b61e146c69553e4bff8289 SHA-256: 366a5914c88965088f5a3c8ef830b0652cfb769c040b95303f27354546c0c8c0
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and 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 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=seal+point+cat+tail+roblox In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369329/normal_5f89d72837a35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383128/normal_5f8bb7d1eff40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f86fea03154f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388157/normal_5f908f903e97c.pdfIn PDF document text
    • https://mijisurux.weebly.com/uploads/1/3/1/0/131070147/morogafogit_dopekotegafosu_mesozepavabop_sumoniwupuwen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f8d55293fd53.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://uploads.strikinglycdn.com/files/72332fe6-1466-43c2-89f6-17d049d05589/95099745731.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9218edcb-714d-49c0-8c48-be87d526b310/roviwebebigili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9ec775a-57e5-4c6d-812e-59773b74a134/pebuxeriloxodoragid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7866f3c-b749-45f6-b127-cba244a3a63f/25526996944.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_off00006fa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA4 3372 bytes
SHA-256: d78f7ace7077ab09a7a3b2a028b81ee561a0b6a650230c037b8bbca2798711b3
font_01_sfnt_off00007b9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9C 4848 bytes
SHA-256: 64718191c8578052a09197a8b757bb5638440795a8a6f245f28151af3942947c
font_02_sfnt_off00008c0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C0E 11032 bytes
SHA-256: a4637592637cf3ba026ec3e611987e0f5bfc28df12e05af821393d6612b3e6c6
font_03_sfnt_off0000b173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB173 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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