Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e85316613002809…

MALICIOUS

PDF

93.2 KB Created: 2021-03-22 16:04:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fd9acb1a6674386e66b90d6a7ce7a76c SHA-1: 946f8c4ce2a7bf5867302ff8f9e6708f05384c6e SHA-256: 4e8531661300280998ddd4f40000f178f4155321332262189ff7715bd07c9fff
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 0.9992

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://jottigo.ru/strik?utm_term=como+crear+un+pdf+desde+el+celular+iphone PDF link annotation
    • https://cdn.sqhk.co/gobopovupav/ipwhcaX/god_simulator_roblox_codes_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/nozedimasav/dhjgigc/to_the_moon_phora_sample.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387224/normal_60249013593e8.pdfIn PDF document text
    • https://cdn.sqhk.co/sesekopusoj/hjhdOha/patalekiboneza.pdfIn PDF document text
    • http://miwewumexurigan.sportsontheweb.net/bunuka.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467273/normal_5fe3945140b7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499283/normal_6017865c065da.pdfIn PDF document text
    • https://cdn.sqhk.co/kusasuzona/hhiLu4H/65987914483.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417023/normal_602c0569c70b8.pdfIn PDF document text
    • https://cdn.sqhk.co/rojozedofaf/eh2Qjep/texas_unclaimed_property_laws.pdfIn PDF document text
    • https://cdn.sqhk.co/zowajomi/f5ujgX8/tilimerafatete.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456135/normal_600237fdf1963.pdfIn PDF document text
    • http://bigijawiv.scienceontheweb.net/what_problems_does_a_bad_catalytic_converter_cause.pdfIn PDF document text
    • http://malarusexomobaf.22web.org/escape_room_answer_level_86.pdfIn PDF document text
    • https://cdn.sqhk.co/riraxizilob/eggS1ic/16489680532.pdfIn PDF document text
    • https://cdn.sqhk.co/bawusipa/dxsieMf/slither._io_unblocked_games_76.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lugenizuridaj.atwebpages.com/mofilefutodik.pdfIn PDF document text
    • http://lemibutudigosuv.rf.gd/vomojaxenewa.pdfIn PDF document text
    • http://kozinid.epizy.com/bsa_citizenship_in_the_world_merit_badge_worksheet.pdfIn PDF document text
    • http://wirirarosutuki.epizy.com/fovadasetiba.pdfIn PDF document text
    • https://s3.amazonaws.com/wizomoravazub/how_to_create_financial_formulas_in_excel_between_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/vewujupukevunabano.pdfIn PDF document text
    • http://kufekisawisewo.onlinewebshop.net/12668033264.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_off00012dac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DAC 5300 bytes
SHA-256: 1848a91e603233f708b34a1d016c1e1ba29d6fa8178ce5c6f28445efa5ff701f
font_01_sfnt_off00013f83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F83 12044 bytes
SHA-256: 72d964981c535d0430c7338d631522274dc417224019621be8fb0c76543d60b7

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