Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d9b936f73b96948…

MALICIOUS

PDF

86.1 KB Created: 2021-04-08 08:08:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f6813626ec5235244d78ebae0fe2327a SHA-1: 40f9af84642c24174e368ce2a95e78089bc99bff SHA-256: 8d9b936f73b969486274614fd095c9bbaca2c9c6a86089b953f6525c37710a64
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded URL that redirects to a suspicious domain, likely as part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, and the document body's content suggests a lure for movie downloads. No scripts were extracted, but the presence of external URIs and the link farm heuristic point to a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/123?utm_term=aarakshan+movie++in+720p PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415543/normal_606832707355b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412159/normal_604cebbce0c2d.pdfIn PDF document text
    • http://reduslim-italiaoficial.site/83338646735fhzhp.pdfIn PDF document text
    • http://ideal-it.fun/sevibofapakupubesetadird637m.pdfIn PDF document text
    • http://albl.ru/wezujejuoxzgv.pdfIn PDF document text
    • http://lnstagram-verifedbadge.com/the_night_begins_to_shine_sheet_musicf3eh1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pazovugal/contract_for_sale_of_used_car_template.pdfIn PDF document text
    • http://lufuzefaz.epizy.com/1941067311.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18c5012c-2504-442c-ac6d-d40c759b78f1/free_android_app_development_course_udemy.pdfIn PDF document text
    • http://gamupuzif.epizy.com/tewupagef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/653e2f41-1699-49e5-867b-b6306623ba44/how_to_use_petsafe_wireless_fence_collar.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/tapuxopojaroziwi.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/google_sheets_input_mask.pdfIn PDF document text
    • http://vukanaxugosazed.rf.gd/resumo_livro_admiravel_mundo_novo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21335b3d-3072-4833-9d45-5a9d93ece315/56520563749.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ab68014-59fa-4eb8-93b0-e6f675b5f81f/jatowoxo.pdfIn PDF document text
    • https://7ffe38df-ef78-47a1-8632-a9c579db478a.filesusr.com/ugd/8ff694_0f5bc428352643d89bf9dc70bc615858.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/61cade72-2f07-4b40-b98f-9ca9d242f05a/what_is_a_metaphor_for_school.pdfIn PDF document text
    • https://54179944-c6a3-49b3-9462-5d1939b6aff2.filesusr.com/ugd/49f5ef_c952a34ea90a4550add4dadf080c020b.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9E 5492 bytes
SHA-256: 79e1829021655b7abd76e1424f7bc7265c5f7a5081de911c9a5901247ae451c4
font_01_sfnt_off00011032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11032 10980 bytes
SHA-256: e31427a6acef35f5fe658966048bc9c7980781a1f1b6f4e5b83a72d9c85a4423
font_02_sfnt_off0001361b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1361B 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8

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