Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0b8f20576c263c4…

MALICIOUS

PDF

82.6 KB Created: 2021-06-06 04:48:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 56c0e92a3ba3c38d6c85651b096cf860 SHA-1: 5d6f28f74c029d6aed839da83c7ae56d2ad761e7 SHA-256: a0b8f20576c263c4557984b839e6c6d389dea8c521d8dadc36f6fbf37e712360
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely as part of a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to contain text related to movie searches, which is likely a lure to disguise the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://synerhu.ru/pbw?utm_term=movies+like+scott+pilgrim+vs+the+world+on+netflix PDF link annotation
    • https://neliwoxe.weebly.com/uploads/1/3/4/8/134871618/dalegebajafede.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378164/normal_606ddc1c3bc60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464724/normal_6032cec1bc9eb.pdfIn PDF document text
    • https://degapepe.weebly.com/uploads/1/3/1/8/131856160/fakarexonubizave.pdfIn PDF document text
    • https://rugulobasogaje.weebly.com/uploads/1/3/4/7/134770789/dolabogawager_jipedide_tomekutowuxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389107/normal_6047a3108e6b4.pdfIn PDF document text
    • https://tojuseviru.weebly.com/uploads/1/3/4/5/134513446/7678355.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372983/normal_600001704e5c4.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/baffad22-534e-45d0-8d1e-fbe38a166dd4/map_of_the_world_outline_printable.pdfIn PDF document text
    • http://pakesobiroge.pbworks.com/w/file/fetch/144696105/57532317704.pdfIn PDF document text
    • http://kolasotosexu.pbworks.com/f/tales_of_the_yawning_portal_maps.pdfIn PDF document text
    • http://gemometis.pbworks.com/f/dunad.pdfIn PDF document text
    • http://giribuv.pbworks.com/f/commando_2_full_movie_720p_download_filmywap.pdfIn PDF document text
    • http://natizasex.pbworks.com/f/how_to_turn_a_into_word_doc_on_mac.pdfIn PDF document text
    • http://wozixokumo.pbworks.com/f/sketching_exponential_graphs_worksheet.pdfIn PDF document text
    • http://minuwaxiper.pbworks.com/f/75121444423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7900342e-feec-42e6-a9b9-7da73d7e557e/pink_dye_pregnancy_test_evaporation_line.pdfIn PDF document text
    • http://mevuteled.pbworks.com/w/file/fetch/144544590/dell_latitude_e6410_bluetooth_driver_download_windows_7_32_bit.pdfIn PDF document text
    • http://vakerul.pbworks.com/w/file/fetch/144696981/frog_jump_letters_worksheets.pdfIn PDF document text
    • http://lulatigono.pbworks.com/f/zusalis.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_off0000f435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF435 5436 bytes
SHA-256: a4365d8f7c8a70058a751d299a97281fd7d7ac17f31e1cfcea8bf50bbd03e93e
font_01_sfnt_off000106b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B0 11284 bytes
SHA-256: 9dcc4ea0d50f5780b4a1f14a3f5eccced5d81cbaeb4aaa71ae8c8cc1cb4d4419
font_02_sfnt_off00012cd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD0 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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