Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dabdf01eae9ec25…

MALICIOUS

PDF

71.6 KB Created: 2021-03-20 18:02:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 52993c970c6c86a335422d951175ee1f SHA-1: 1c3527818b7685faf0c8208fcba55ef56811e44a SHA-256: 1dabdf01eae9ec259635990a3eab542dc6564f81d36afd8e100ec4d68eb1df1a
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 ClamAV and 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 0.9998

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://nipisod.ru/wix?keyword=heron+and+the+hummingbird+story PDF link annotation
    • http://znakomstva18x.site/what_are_the_best_exercises_for_strengthening_your_coreiw90b.pdfIn PDF document text
    • https://cdn.sqhk.co/jufemipikuke/iijduid/red_alert_2_units_download.pdfIn PDF document text
    • http://bafedudovodamo.medianewsonline.com/peledubisesisemeba.pdfIn PDF document text
    • https://cdn.sqhk.co/zubejavaxuvu/8jfieMG/sas_survival_guide_amazon.pdfIn PDF document text
    • http://jixazepo.mywebcommunity.org/agenda_2020_para_descargar.pdfIn PDF document text
    • http://dommasters.site/51422524358laxjv.pdfIn PDF document text
    • http://zerkalo-fugicar.website/paisseur_de_trait_autocadwzzks.pdfIn PDF document text
    • https://cdn.sqhk.co/petawelesup/ggeiiDL/does_youtube_live_stream_nfl_games.pdfIn PDF document text
    • http://trixy-matrix.space/csgo_config_einfgene08p0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xumuritikoxuk.myartsonline.com/how_to_replace_a_moen_bathroom_faucet_cartridge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2da23419-a9bd-47bc-945d-8419b8578589/7884293303.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c443e22-bbe3-4fe2-8c55-32dd8fa9fa96/19852306205.pdfIn PDF document text
    • http://totuxivez.onlinewebshop.net/xatewalisavojufavapupir.pdfIn PDF document text
    • http://samesesodore.onlinewebshop.net/89536261145.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4adcf318-4478-4c46-91c4-e707c64b6e31/toastmasters_table_topic_master_speech.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97dee469-6e74-48ed-9446-f3a295d1b12d/how_long_is_maternity_leave_in_the_philippines_2019.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_off0000dc41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC41 5408 bytes
SHA-256: d6790c92986a4e39fc787c7a698ad5ec0a3c68787585e2d855f10afe7798a221
font_01_sfnt_off0000ee7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7A 10288 bytes
SHA-256: fcef0f1044f2ae174a9fcd0486f6949283d2481506ad3a6d86753662bacf031b

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