Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ce6bae8cb3aed36…

MALICIOUS

PDF

74.1 KB Created: 2021-04-03 22:44:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: dad372336a241d80f52fc59b857d2f81 SHA-1: 70e2b55f278100908bc6d39ad4de23c423149c94 SHA-256: 8ce6bae8cb3aed36c4290606b886bfc89d53599782e5f1050f8af15bf89a7b6e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://mezovuduw.ru/123?utm_term=anarkali+disco+chali+song++pagalworld PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4375355/normal_6002e4a3ba39e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421612/normal_5ffacbe189402.pdfIn PDF document text
    • https://cdn.sqhk.co/dobopejig/WJJqhgc/kidimevojedoxifu.pdfIn PDF document text
    • http://pojebanidik.mywebcommunity.org/financial_auditing_process.pdfIn PDF document text
    • http://kedugobepuged.mywebcommunity.org/91916016383.pdfIn PDF document text
    • http://mobeditobaxul.scienceontheweb.net/tugezaduwuv.pdfIn PDF document text
    • https://cdn.sqhk.co/tolononof/Injigfo/wuwupuzaxotabanaruru.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/jcii1dG/poninejakapakev.pdfIn PDF document text
    • https://cdn.sqhk.co/raxinosi/iT37gcF/37386634816.pdfIn PDF document text
    • http://ruvikuvi.mywebcommunity.org/wekarolebese.pdfIn PDF document text
    • https://cdn.sqhk.co/moxoxitij/K5QLhay/tank_defence_cap.pdfIn PDF document text
    • https://cdn.sqhk.co/nupepewomaxu/fieghSD/commuter_rail_boston_lowell_line.pdfIn PDF document text
    • https://cdn.sqhk.co/dusimefosix/P5uXihy/bollywood_box_office_2020_wiki.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/dca3c36d-015c-4925-8ae6-66435a815c8f/what_is_a_1971_ford_mustang_mach_1_worth.pdfIn PDF document text
    • https://592908bf-dd96-48cc-88d9-ffebbdd10d84.filesusr.com/ugd/f34823_a712bd2b84ce4940bd0d17aac61cee80.pdf?index=trueIn PDF document text
    • https://cf21b241-1edd-4e7a-8b85-4b7fa12bec5a.filesusr.com/ugd/835652_ee7243877e9148c8ab7a3ed5537f7c6f.pdf?index=trueIn PDF document text
    • https://0ea28b16-58c2-472d-b6be-3e97fe9b7bb6.filesusr.com/ugd/696b8a_fc2155bc78be4746bad04d57609cb87c.pdf?index=trueIn PDF document text
    • https://20996a60-9695-4f45-8fdb-44bdc783da55.filesusr.com/ugd/c57cae_3ff3101f81744f47ac4f1faa0a0bdf26.pdf?index=trueIn PDF document text
    • https://f538c46d-6aff-4997-95da-320e40b30403.filesusr.com/ugd/262ba4_7577749bec2847cfa505b22760d3ceb1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/03628078-5c11-4b51-a37e-65c582d31983/namumiretafi.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_off0000e1af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AF 5480 bytes
SHA-256: 75bcf86e41d5bf785ae7610158b73e9b5c9c44ca9833089ed5218092f32422b4
font_01_sfnt_off0000f464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF464 11400 bytes
SHA-256: 99726d368113f878deb443b15a7dbdb2f66e49474064b44b30a4f3b2ceb75e7b

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