Malicious PDF — malware analysis report

Static analysis result for SHA-256 7457d37c70d22448…

MALICIOUS

PDF

80.3 KB Created: 2021-04-05 21:25:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 10e781ff7c672fcbe761f7d7f8adb820 SHA-1: 124e74005edff3ef4af834c3f771368d9fca4832 SHA-256: 7457d37c70d22448b9cd48f27b4b7d48178f978d25abd22d095640bec81f7411
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 0.9994

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://resalured.ru/award?keyword=boy+scout+popcorn+prices+2020+pdf PDF link annotation
    • http://zobowinizigimef.22web.org/govukaz.pdfIn PDF document text
    • https://seririgikum.weebly.com/uploads/1/3/0/7/130739922/8a235.pdfIn PDF document text
    • http://zirirukefup.22web.org/dolonajorujodipatel.pdfIn PDF document text
    • https://xupufofi.weebly.com/uploads/1/3/4/7/134766196/2db78.pdfIn PDF document text
    • http://kakorezikudu.mypressonline.com/26659620800.pdfIn PDF document text
    • http://kuvewumewatono.22web.org/brookstone_pocket_projector_micro_manual.pdfIn PDF document text
    • https://tekikolunusujok.weebly.com/uploads/1/3/5/3/135304640/3999805.pdfIn PDF document text
    • https://nurosizakudagag.weebly.com/uploads/1/3/4/6/134699554/xasufibokebirig_nojaxavurowi.pdfIn PDF document text
    • https://kiriwalukejogof.weebly.com/uploads/1/3/4/3/134310578/buzajafemonivama.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jojajixinoxu.epizy.com/16527659923.pdfIn PDF document text
    • http://gametusepezuka.rf.gd/5230097252.pdfIn PDF document text
    • http://xikepilapap.rf.gd/breasted_history_of_egypt.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/xijeresuvovujanozonu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b5e9594-9b48-41ff-ae98-ac7315e8515c/helter_skelter_definition_manson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2595f70d-da9b-4318-ad4f-cf9ae12d8840/how_to_request_a_letter_of_recommendation_via_email.pdfIn PDF document text
    • http://nizowozutagele.atwebpages.com/vedezogimusetozutifeno.pdfIn PDF document text
    • http://sasebuza.epizy.com/zaxeraxoborewaderop.pdfIn PDF document text
    • http://wugujub.onlinewebshop.net/kajolubidopigenexifon.pdfIn PDF document text
    • http://wapupegalul.epizy.com/converter_em_dwg_gratis.pdfIn PDF document text
    • http://xolelapideruse.epizy.com/7738222256.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/cisco_vpn_free_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/don_t_stop_believin_trumpet_sheet_music.pdfIn PDF document text
    • http://faxowake.epizy.com/michael_crichton_westworld_livre.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF931 5332 bytes
SHA-256: 45509221b7b431f96b508b2f7a5319759b90d46affafb1e34316cfe1ead5f890
font_01_sfnt_off00010b7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7B 11368 bytes
SHA-256: be1c04b66e49ebba1b1f2acf61ca9eddb0dbf6a1e4d80456a88cf4f4ef75599c

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