Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e9e745f4f8fe616…

MALICIOUS

PDF

39.3 KB Created: 2020-11-01 17:28:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8de10f96b0cf4864d6aeb1201993f1cd SHA-1: dc589b9fcb6819bd525819a1495b9cd9377f2156 SHA-256: 0e9e745f4f8fe616d13e391cbd0fbf41858fc621a6372f7201a6579e1d0d0c74
124 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/123?keyword=z+bar+hanger+lowe+s In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382189/normal_5f932c9e11b6d.pdfIn PDF document text
    • https://setumimirakav.weebly.com/uploads/1/3/2/6/132681532/jogofuru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366374/normal_5f87b2a8cd081.pdfIn PDF document text
    • https://pefuxagofir.weebly.com/uploads/1/3/4/3/134359429/wevaxifuva-kurexok-vapogi.pdfIn PDF document text
    • https://niweduval.weebly.com/uploads/1/3/4/3/134349673/ratovadifavevuvaz.pdfIn PDF document text
    • https://fewaxozane.weebly.com/uploads/1/3/4/3/134341296/375f1777db.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/9051060.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://s3.amazonaws.com/takebemanijewok/steelers_vs_ravens_live_stream_online_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a17c605f-0457-4af1-a845-b6e12c92bfa8/mipedolid.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/mario_party_2_n64_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/52873573315.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24f9a4ef-21d8-4e2f-8869-6bca4372cb05/toshiba_e_studio_205_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/57127584619.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E85 4796 bytes
SHA-256: 07b1fc6472e1acfe6105c94ff772f4c8972579257c319593a09e7e09ce3cc3ce
font_01_sfnt_off00005ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED1 10536 bytes
SHA-256: da4a2f16285a1b7b37d8765cca00603c51b26b5a4bcbc642d4ecf53d2c99253c
font_02_sfnt_off0000822d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x822D 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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