Malicious PDF — malware analysis report

Static analysis result for SHA-256 17ba6096684b4adc…

MALICIOUS

PDF

76.1 KB Created: 2021-03-14 14:53:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3b7e6b05167aadc6872b6eae7d6057a4 SHA-1: 4ca29614b9fade0bb60d842835bae12d80c6c450 SHA-256: 17ba6096684b4adcee7e8e9b1ee9b08439cbeb8c8d8f083e8c2177d9bb26db49
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-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://botokaw.ru/wix?keyword=a+world+of+ideas+9th+pdf PDF link annotation
    • http://tiwilofojifig.sportsontheweb.net/fuziwenesonu.pdfIn PDF document text
    • http://rumafelaneli.mygamesonline.org/alman_dili_oyrenmek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451950/normal_602d73e130537.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450439/normal_6027f35f8868a.pdfIn PDF document text
    • http://jarevine.mywebcommunity.org/bajaj_allianz_health_insurance_premium_chart.pdfIn PDF document text
    • http://feremujidonigu.getenjoyment.net/nitecore_intellicharger_i2_battery_charger.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421782/normal_6028eac2b91f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466662/normal_6006d5fcb6d0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489994/normal_60209c9b485b5.pdfIn PDF document text
    • http://sevagawos.getenjoyment.net/how_many_employees_does_macys_herald_square_have.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474992/normal_6016e5c3453aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368760/normal_60091adfb5cb8.pdfIn PDF document text
    • http://bajifepeselok.sportsontheweb.net/pilesegimefijug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385021/normal_5fe09222ec155.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/three_major_criticisms_of_differential_association_theory.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499329/normal_5fdb18303799d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vunowobaxab.epizy.com/fawurumemitegatupum.pdfIn PDF document text
    • http://nozepixi.rf.gd/dibujarte_libro_1.pdfIn PDF document text
    • http://situgew.epizy.com/excessive_callus_formation_in_bone_healing.pdfIn PDF document text
    • http://sujunutab.atwebpages.com/o_que_so_coliformes_termotolerantes.pdfIn PDF document text
    • http://remavolef.epizy.com/iqiyi_inc_annual_report_2017.pdfIn PDF document text
    • http://wetizizokixo.epizy.com/namojavaguzenolixapogi.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/nugulijurowugifuzosirala.pdfIn PDF document text
    • http://vavubal.epizy.com/will_warcraft_3_classic_be_free.pdfIn PDF document text
    • http://misugivunuzu.epizy.com/sazatubepobarinovusom.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_off0000e823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE823 5368 bytes
SHA-256: 238ee2f9fba76d1086487e5316b6a1c55bcacabfd11331c02322a3ee75b68aee
font_01_sfnt_off0000fa69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA69 11708 bytes
SHA-256: f7561c58c082cf0fd70d0c94dd07230ae8a628e58f57b0e34f1bb7b7c8a9ef6a

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