Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aed04304d9367c6…

MALICIOUS

PDF

90.3 KB Created: 2021-05-06 10:53:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0c4295fc13c4f4fd25e69e55d03acdaa SHA-1: 124dad474d65628c46891a1f819eb4fb04ffd923 SHA-256: 2aed04304d9367c64ccae14acfc205572f8e23a156f4c3ef5086b4537bc590a2
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 0.9996

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://jacksth.ru/strik?utm_term=tempstar+ac+reviews+2019 PDF link annotation
    • https://cdn.sqhk.co/surikuzezun/3MBfhjN/xabigefabinabikafujama.pdfIn PDF document text
    • https://cdn.sqhk.co/zarejesorufo/idGpjef/hexagonaria_coral_fossil.pdfIn PDF document text
    • http://dontbeshy.xyz/transformar_celsius_em_kelvinm60la.pdfIn PDF document text
    • http://vurujupafowutox.mypressonline.com/audio_visual_materials.pdfIn PDF document text
    • https://cdn.sqhk.co/nawamuzimosu/O4giidV/mipuwoxipofiwagudesiwe.pdfIn PDF document text
    • http://wizapivizesib.mygamesonline.org/wasofupowuzoni.pdfIn PDF document text
    • https://cdn.sqhk.co/wanaxowuwot/oheCMgj/fabikikuzajedu.pdfIn PDF document text
    • http://tapagigozi.medianewsonline.com/65563844734.pdfIn PDF document text
    • http://gojavodevagajuw.mygamesonline.org/pogimenisurinefofojid.pdfIn PDF document text
    • http://uscarinsurance.info/divinity_original_sin_2_walkthrough_deutschdcok2.pdfIn PDF document text
    • http://poradoit2.site/pemerutizabnder0.pdfIn PDF document text
    • https://cdn.sqhk.co/soziwariru/jNkLcl8/nimikusaxalogirulomux.pdfIn PDF document text
    • https://cdn.sqhk.co/xenaporo/fggqhcf/appradio_unchained_free_download.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/how_to_prepare_a_risk_assessment_form.pdfIn PDF document text
    • http://lnstagram-helps-contact.com/ethnography_research_designz37bn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://minivenema.atwebpages.com/10630222304.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adef82b9-2fe7-454f-8ac6-53c02955a501/how_to_fix_keurig_2.0_coffee_maker_that_wont_brew.pdfIn PDF document text
    • http://desujiruvomeb.myartsonline.com/tulavat.pdfIn PDF document text
    • http://daximogosamov.myartsonline.com/arunima_sinha_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33ea1856-c86d-42f4-9918-c17d823977a1/how_to_add_references_through_mendeley.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2adce7b4-a42d-4fd4-8d22-adb1cae88589/94179562371.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010bf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF2 5632 bytes
SHA-256: ce2077fb2d22abb3e82f5352c0a6debcd518b58aca890181c88a453f6ed35cce
font_01_sfnt_off00011f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F16 11672 bytes
SHA-256: 738ed313ca6b4ccf84f4555b7a497f7639223e10bc6b6254e6cf18ed5731abd4
font_02_sfnt_off00014739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14739 16068 bytes
SHA-256: 9e1271d681207e96fe60c94df920a27091a957dc81e2614e9e6235263a34fce6

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