Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9120bd61829658a…

MALICIOUS

PDF

82.4 KB Created: 2020-11-05 09:59:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e58131ca35bb323e58b500c82f56a13a SHA-1: d89756fa496e146da5aa4de5d0c8144d837921d8 SHA-256: e9120bd61829658a792fec5d0e214c5ce6d35f6cc686228e27e8549140d69fa4
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://ttraff.link/123?keyword=stick+war+hacked+unblocked+not+games In PDF document text
    • https://siveruvamavekug.weebly.com/uploads/1/3/4/2/134266289/xewena_gefefogu_riribetumanozej_wavopede.pdfIn PDF document text
    • https://mabedokuk.weebly.com/uploads/1/3/4/5/134582143/8037494.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366382/normal_5fa3289f4a82d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f8f9662472ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367919/normal_5f87e8e1a3898.pdfIn PDF document text
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/9985793.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370063/normal_5f88a4936a0e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443624/normal_5f9d0e471f221.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/e2ba1ac4-824d-42b1-bf40-528456151cf0/ziwemoxudidalanimob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceb1e03b-cf2b-4d23-86cf-3bf73ae8b6c5/masugarefipadubonan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1899ee98-af13-4f0c-9be3-72b64c7680dc/fnaf_3_map_minecraft_1.12.2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/185ee4cc-1df7-4a01-ab3a-93650a46d55e/vifitonivesafodojovot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1acf8db-30fd-4e3c-bbe9-e671d8f0e35b/zupawitotiled.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e8f7a04-aac3-47f0-b3d9-1e568e8c5716/88624482909.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f01d6ad7-b261-443b-9e7d-e0c7f480bf35/shading_worksheets_for_art.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_off00010659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10659 5752 bytes
SHA-256: 225d2b5ae1ba7930a2947464c4f88dd5664c6de5dece6d22fe7bff894820cb7a
font_01_sfnt_off000119d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D9 10180 bytes
SHA-256: 5b920b366175917e8b3ca72b430ed92be5d4233a73b1f34f6d4f7c2231440e14

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