Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ff47d9ac595e67b…

MALICIOUS

PDF

76.4 KB Created: 2021-05-11 08:21:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 28a62d1d7657b9b3b9bbc1cc8fbec123 SHA-1: 6e6f41528dd221e3ead385a235917de962ba82a5 SHA-256: 6ff47d9ac595e67b72d38365163692df64361a7ae8217e03b497762dfb62ee02
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with several pointing to disposable hosting and exhibiting link farm characteristics. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing. The document body, though heavily obfuscated, appears to be a lure related to baby product instructions, designed to trick users into clicking the malicious links.

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://vilenefex.ru/strik?utm_term=graco+duetconnect+lx+swing+and+bouncer+instructions PDF link annotation
    • http://vostokzapad.su/42946819388ym529.pdfIn PDF document text
    • http://itash.space/how_do_i_control_the_volume_with_my_altice_remotegwy2m.pdfIn PDF document text
    • http://rabejagoruwobol.66ghz.com/google_chrome_thai.pdfIn PDF document text
    • https://cdn.sqhk.co/numiwuzuwix/REjihdY/barcelona_tour_guide_app.pdfIn PDF document text
    • https://cdn.sqhk.co/leluforeref/RGje8je/linkedin_learning_cost.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/5fhidgg/nora_fatehi_all_songs_list_mp3_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423752/normal_602535a562f4e.pdfIn PDF document text
    • http://am-sound.ru/59474991637ebc1z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423166/normal_5fd9f3e09c5c5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zapofekeba.rf.gd/vocabulario_de_alimentos_y_bebidas_en_ingles_y_espaol.pdfIn PDF document text
    • https://dd3528e8-ded0-4753-843e-0d3cb9f542e7.filesusr.com/ugd/4d6844_f0d555825e264cf8acac16bd58aea6c8.pdf?index=trueIn PDF document text
    • http://fuzesezetigogum.epizy.com/amazon_kindle_model_d00901_manual.pdfIn PDF document text
    • https://c5b3e1fc-3b55-407d-a8d9-2bfa6c9015c1.filesusr.com/ugd/6df244_a393732440844a24b472051ebc2698a4.pdf?index=trueIn PDF document text
    • https://c941d99d-b58b-4215-81ce-525e38db2b81.filesusr.com/ugd/2dc4cf_31b4142c49f5433099a67e0968a62e6e.pdf?index=trueIn PDF document text
    • http://tavokitewigi.rf.gd/tamil_new_movies_2018_free_websites.pdfIn PDF document text
    • http://zadaxuro.rf.gd/oxford_house_dallas_texas.pdfIn PDF document text
    • https://f98f40d2-b649-4e6b-99af-b89bbf2331ff.filesusr.com/ugd/724bd4_218a174cfbc740e1ba041e1028258b00.pdf?index=trueIn PDF document text
    • http://sudimomovaw.epizy.com/guided_reading_activity_2-_1_economic_systems.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_off0000ed56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED56 5440 bytes
SHA-256: fa407839b3e1708a42723cdd3ddfd7a1b52f4b770ef3063d7d2bb8774ee3eed2
font_01_sfnt_off0000fff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF9 10584 bytes
SHA-256: 897fc7fb939842ecacd2deed5962346a128447c584526d7e44bcce0d461e23eb

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