Malicious PDF — malware analysis report

Static analysis result for SHA-256 7291563f9c6a2fb2…

MALICIOUS

PDF

79.8 KB Created: 2021-03-28 01:10:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2b918eea5fd1cbafbbb839facfa248d9 SHA-1: 1259d6ec83943aac761812b023de43cbd88d2210 SHA-256: 7291563f9c6a2fb286e48af4ca2ed4a37dad435a33a59e846f2a6c6d92360d27
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9994

Heuristics 4

  • 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://gimoguvi.ru/wix?keyword=nick+hipa+twitter PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4475215/normal_5fe5cf9dad939.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449616/normal_5fe23454ad9e7.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/83503313052.pdfIn PDF document text
    • https://cdn.sqhk.co/fafujedajir/hdYhhhb/digestive_enzymes_scientific_definition.pdfIn PDF document text
    • http://lejunuzegakikuv.mypressonline.com/john_deere_z425_deck_rebuild_kit.pdfIn PDF document text
    • http://mopowataxix.medianewsonline.com/causas_de_angina_de_pecho.pdfIn PDF document text
    • http://witikotuxigere.scienceontheweb.net/xutemerupakiguf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422893/normal_5fc72172366c7.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuvedije/aLcb6ja/94363116847.pdfIn PDF document text
    • https://cdn.sqhk.co/zivudasexoni/jdNdbfm/sonic_adventure_dx_mods_pc_download.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/hrjfCgi/doranigo.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/jgfjbha/descargar_ball_and_colors_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491151/normal_600aa4d7be910.pdfIn PDF document text
    • https://cdn.sqhk.co/sexuzoropa/hfYxieS/46235256947.pdfIn PDF document text
    • http://gomigapujasep.sportsontheweb.net/android_studio_java_tutorial.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490918/normal_60208aa085730.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/5266e7d6-f060-4ded-bde3-c6ba5715401e/pifafelirir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0660ef44-0f49-4fd9-81a1-ec593ed0db5d/jokutogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37a67738-2806-4cad-9044-d07a23db3777/how_does_a_nozzle_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7834dfe4-2c2a-495d-8143-9bd8c7858643/is_supply_chain_management_a_good_career_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed2b1684-af2d-4d4c-87c8-0865fc262a25/ford_focus_c_max_2005_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efa6dda3-ba0d-4b57-a6ec-84bb74569e6c/to_be_a_slave_book_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0503b70-89cb-4064-be87-aaf480c10862/kenmore_elite_bottom_freezer_refrigerator_model_795_not_cooling.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_off0000fae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE7 4936 bytes
SHA-256: a3c06d623a2a55f405c78116186e6a6bef04cba93f37b0feb99d43545ba52b6f
font_01_sfnt_off00010bc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC8 11124 bytes
SHA-256: 72ea42af708e785717a126bf478549f3d4cca416d220a5655a32c569304ba312

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