Malicious PDF — malware analysis report

Static analysis result for SHA-256 464815cc95979f9c…

MALICIOUS

PDF

74.5 KB Created: 2021-03-19 01:03:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: da7555ce73b77437cf69cb7d11b13e0f SHA-1: 381bd9606429b9cb87b7f8bef2594a831a08b77b SHA-256: 464815cc95979f9c00a4428928bb105170f3777aba9032df2f046f1a3f03a85a
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 0.9997

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://resalured.ru/award?keyword=clinical+virology+richman+pdf PDF link annotation
    • https://cdn.sqhk.co/jesupasuzoku/frjbhcH/bmobile_deals_on_phones.pdfIn PDF document text
    • https://cdn.sqhk.co/jonilinenuvo/aja0Xja/deseferewimanibenu.pdfIn PDF document text
    • http://rebelliona.online/77566851711mmg47.pdfIn PDF document text
    • http://chisto-chisto52.ru/4126088695221tic.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389603/normal_6053dbafe1ddd.pdfIn PDF document text
    • http://curvepreloved.com/bissell_turboclean_powerbrush_pet3ct60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444366/normal_6023c8320748a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393754/normal_601f17def0452.pdfIn PDF document text
    • http://lunesygets.xyz/6997387212021azb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421939/normal_6027f78d4aeef.pdfIn PDF document text
    • http://onlinetyz.xyz/dezutiwapoxekusoqntpa.pdfIn PDF document text
    • https://cdn.sqhk.co/reretukida/ODDmiia/30_ways_to_die_minecraft_pe_map_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459329/normal_604a82a32884e.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/8abd8387-f26e-4187-8218-c6af7daea3d4/dibujos_de_rostros_de_mujeres_con_flores_a_lapiz.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/32233764003.pdfIn PDF document text
    • http://musowafotoxipid.epizy.com/c1_differentiation_worksheet_c_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70ff7621-de88-4742-9a2f-810d7d7f0b5d/33402303583.pdfIn PDF document text
    • http://gikiwajufekozi.rf.gd/vermont_casting_encore_price.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/c._g._i_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/kagovudasikitipoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4190185b-ae95-4e00-bb79-13413ae878d7/gantz_g_manga_download.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_off0000e6ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AB 5456 bytes
SHA-256: d350e1d2c38521ff04d1c01b0df4e8c1bd91207248ba8a55a338dce280d8c367
font_01_sfnt_off0000f921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF921 10524 bytes
SHA-256: f3e42ab6d8c145572076fb873f71463c3f38316e179b0f92aba08e2e41227aaf

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