Malicious PDF — malware analysis report

Static analysis result for SHA-256 f58f85f2d8b0f315…

MALICIOUS

PDF

82.4 KB Created: 2021-06-12 04:53:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9b61e2b3fa1b4675a8a2c76e5f620d4b SHA-1: c97cf4e2b341ea59fb4e6d6944686f790eca76e7 SHA-256: f58f85f2d8b0f315df83c0897b8e5a8631f21709438d332417adb6147271f795
126 Risk Score

Malware Insights

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

The PDF file contains multiple heuristics indicating it is a malicious phishing document, including ML classification and ClamAV detection. It embeds external URIs, with one prominent URL pointing to a suspicious domain that is likely part of a link farm designed to redirect users. The document body, though heavily obfuscated, contains keywords related to 'texture pack skyblock hypixel' and application metadata, suggesting a lure to trick users into visiting the malicious URL.

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://synerhu.ru/pbw?utm_term=texture+pack+skyblock+hypixel PDF link annotation
    • https://sarodinejafa.weebly.com/uploads/1/3/4/7/134762654/vasorojatagaw.pdfIn PDF document text
    • https://kabijibijeg.weebly.com/uploads/1/3/4/9/134900291/meruvagigow_rowukepojaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://guleribiko.pbworks.com/w/file/fetch/144662805/26030416394.pdfIn PDF document text
    • http://gapufipi.pbworks.com/f/hebrew_gematria_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3931d4c6-0cf5-4a84-9fbb-0eb147e9bea7/bitomenubaxevixavef.pdfIn PDF document text
    • http://dudatuj.pbworks.com/f/academy_broadway_cabin_tent_instructions.pdfIn PDF document text
    • http://dazokarodu.pbworks.com/f/ximixunobivopegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c642b49-58e2-493f-8cd3-34b7b3f29c35/lasko_4920_tower_fan_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/992ebff7-e22c-4056-aacf-1081de4460dc/glencoe_science_chemistry_matter_and_change.pdfIn PDF document text
    • http://sewafebi.pbworks.com/f/how_do_you_write_a_30_day_notice_to_a_tenant_to_move_out.pdfIn PDF document text
    • http://metudebebi.pbworks.com/f/24152621085.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25f61950-8966-4888-94da-a949cdb134e8/43306095182.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f77f7e41-634e-47bb-aa9c-d71c6dbe509a/how_do_you_feel_when_reading_a_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/342b245b-6a3f-4bc8-b2df-10a8e5b3544e/worlds_together_worlds_apart_volume_1_concise_edition_ebook.pdfIn PDF document text
    • http://kunixove.pbworks.com/f/kotirujomexikufebez.pdfIn PDF document text
    • http://juboxeraris.pbworks.com/w/file/fetch/144814713/hard_reset_iphone_6_s_itunes.pdfIn PDF document text
    • http://zumejukikug.pbworks.com/f/bolt_connection_design_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/476fc737-c5f1-4464-aa3a-302a6220c539/como_calcular_a_absorbancia_a_partir_da_transmitancia.pdfIn PDF document text
    • http://mifimoruzuwo.pbworks.com/f/slay_the_spire_ironclad_ascension_20_guide.pdfIn PDF document text
    • http://wuxikadafi.pbworks.com/w/file/fetch/145158036/xonaxasakarokeseki.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_off000101b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B0 5344 bytes
SHA-256: 6a75263ff6fb730b31d239804e5151fcc56346742c2982411515a309792d8788
font_01_sfnt_off000113d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D9 11368 bytes
SHA-256: 7b69283d7defe86bc541c9c4951cd5bc55b76b2532f42637f11516d90968d578

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