Malicious PDF — malware analysis report

Static analysis result for SHA-256 a56f727bce89e043…

MALICIOUS

PDF

72.3 KB Created: 2021-05-05 13:22:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 016c1811cf081601e893d6ad5dac78f0 SHA-1: e250959405b59f5205558869da22ef3d2881b367 SHA-256: a56f727bce89e043acac393daf8285dacd0d6c2b60bf123e9ec46c2ada6f4579
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 0.9991

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://leonvi.ru/strik?utm_term=pioneer+deh+150mp+bluetooth PDF link annotation
    • https://cdn.sqhk.co/sogefuluf/igdhcgi/talking_tom_gold_run_mod_apk_download_free.pdfIn PDF document text
    • http://gazedalepi.sportsontheweb.net/90002643397.pdfIn PDF document text
    • https://cdn.sqhk.co/xonarewu/NfgdHhb/buparaneg.pdfIn PDF document text
    • http://danoguvu.medianewsonline.com/carta_de_apresentao_de_empresa_para_cliente.pdfIn PDF document text
    • https://cdn.sqhk.co/ponesigis/ejh8Vjj/voices_of_fire_judges.pdfIn PDF document text
    • http://janorewaxeno.mygamesonline.org/sapper_handbook_for_sale.pdfIn PDF document text
    • http://miraluvofizobe.medianewsonline.com/abbyy_transformer_download_crack.pdfIn PDF document text
    • http://jufanurozud.getenjoyment.net/download_employment_news_paper_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/rifelefiw/fYfVKLA/free_online_flowchart_making.pdfIn PDF document text
    • http://kidufamipowanot.mywebcommunity.org/55036572419.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/b3c08681-2b6b-48e6-a37a-270725315efd/is_moultrie_ga_a_good_place_to_live.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/gangster_scene_2_song_djpunjab.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/vofizikirumebajijazeje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0030ad5d-2965-4378-9c75-a0a3c5a2a1f3/backbeat_fit_earbuds.pdfIn PDF document text
    • http://pupagerirawax.myartsonline.com/gasavesegasexikadupet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2231920-d14a-4517-bd0f-c4273e9cd803/fl_studio_12_apk_free_download_for_pc.pdfIn PDF document text
    • http://rixigor.onlinewebshop.net/backpack_literature_5th_edition.pdfIn PDF document text
    • http://vujuvisesakok.myartsonline.com/jidizenif.pdfIn PDF document text
    • http://jekurur.atwebpages.com/mitet.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/facebook_windows_phone.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/how_to_reset_asus_router_factory_settings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33ab7315-dbea-4d7e-ba95-d0642aed44b5/zeperena.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/99108259713.pdfIn PDF document text
    • http://gipetiwivi.atwebpages.com/coldplay_scientist_piano.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_off0000d9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FE 5272 bytes
SHA-256: e60b1509877e2a923060948ce171030644986262886ba4e8889b8330d69b0537
font_01_sfnt_off0000ebbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBF 12072 bytes
SHA-256: 305be19c4a9dcf62da42790087018c92337471191120e5968e14faf0aa641392

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