Malicious PDF — malware analysis report

Static analysis result for SHA-256 35630cafab426b07…

MALICIOUS

PDF

74.7 KB Created: 2021-06-11 10:47:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6fd90c0906342067fa74c76faa5b3efd SHA-1: 21b9b977e18430da109ab0fb3714d195a8b7c06b SHA-256: 35630cafab426b07eeec351ff5f3664c8977a87f50fac07924cf77b66aef6dde
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://huntic.ru/pbw?utm_term=fort+minor+remember+the+name+song+download+320kbps PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378151/normal_606bd062752de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380857/normal_6037ed9e684df.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467589/normal_5ff249d6d36e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403118/normal_60b94601429f2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://letonepamusi.pbworks.com/w/file/fetch/145103136/31911909283.pdfIn PDF document text
    • http://xuwuziz.pbworks.com/f/principles_of_development_wolpert_download.pdfIn PDF document text
    • http://gibabug.pbworks.com/f/download_game_true_skate_mod_apk_gratis.pdfIn PDF document text
    • http://nilanom.pbworks.com/f/83333794845.pdfIn PDF document text
    • http://xegosigex.pbworks.com/f/watch_free_movie_apps_for_android_2021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bcf9371-664f-433e-a11f-88e5f0b98d68/58623020790.pdfIn PDF document text
    • http://litorabi.pbworks.com/f/d_major_diatonic_scale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/259d69a3-0433-42a7-8c18-af8217fc7ffc/how_to_fix_bobbin_winder_on_singer_sewing_machine.pdfIn PDF document text
    • http://kokoxudalux.pbworks.com/w/file/fetch/144809727/endless_frontier_elf_airship_guide.pdfIn PDF document text
    • http://jujirafamena.pbworks.com/f/the_flowers_of_war_full_movie_watch_online.pdfIn PDF document text
    • http://jujirafamena.pbworks.com/w/file/fetch/144465447/bogigikozozep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca34777a-1616-44ee-b108-a971a6cf458b/exerccios_de_potenciao_e_radiciao_9o_ano_com_gabarito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a8bc13d-48d2-4c23-8ad5-70197539985a/tefuravapatutexisadulaz.pdfIn PDF document text
    • http://mibegenav.pbworks.com/w/file/fetch/144445581/new_whatsapp_status_video_2018_download_mp4_hd.pdfIn PDF document text
    • http://jopamedet.pbworks.com/w/file/fetch/144452487/cub_cadet_526_hd_swe_manual.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_off0000df9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9C 6060 bytes
SHA-256: 75896ba8cd4887dc99034dd89f32e7ac4d96a6e8091f1c24ddf322811026d149
font_01_sfnt_off0000f420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF420 13144 bytes
SHA-256: 3029a562eb35ecb96c0bcb1abdcb96e5a8187333cb70df08a205b07e11a4d693

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