Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd0f18adc4e6d7c…

MALICIOUS

PDF

79.7 KB Created: 2021-03-02 22:59:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 63664eb112eea316eaf4fe42c80e5e6d SHA-1: 2723ebaffd3f7d5216bc8a871023b85396dee923 SHA-256: bbd0f18adc4e6d7ca1744411e557048b70a3e0a0a06bf9c0c3343711f2890118
126 Risk Score

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 0.9996

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://leonvi.ru/wix?keyword=night+chapter+6-9+questions+and+answers PDF link annotation
    • http://atelier-spb.com/is_indian_stock_market_closed_tomorrowpvvs6.pdfIn PDF document text
    • http://coolvdomaion.online/angular_momentum_in_quantum_physics_biedenharn1tbq0.pdfIn PDF document text
    • https://fugomunufu.weebly.com/uploads/1/3/4/5/134586131/kozivota-raledivev-mosumuvam.pdfIn PDF document text
    • https://gixakipero.weebly.com/uploads/1/3/1/4/131412713/somunepeg-worawavapogug-zejuz-gaxosep.pdfIn PDF document text
    • http://itwow.info/teori_pragmatisme1g6dt.pdfIn PDF document text
    • http://borejukeluteva.mygamesonline.org/2015_honda_odyssey_transmission_fluid_filter.pdfIn PDF document text
    • https://cdn.sqhk.co/temegolu/ihzhgXV/vejesarigux.pdfIn PDF document text
    • http://majikok.mygamesonline.org/16957180224.pdfIn PDF document text
    • https://cdn.sqhk.co/xakurusuk/Y3hifih/kizikizafotumepuk.pdfIn PDF document text
    • https://cdn.sqhk.co/gotirawuz/agihaid/76771913413.pdfIn PDF document text
    • https://renobikedasel.weebly.com/uploads/1/3/4/8/134897329/dizimigugasiweveno.pdfIn PDF document text
    • http://pihodze.com/can_you_do_dbt_onlinen2j7y.pdfIn PDF document text
    • http://like-store.site/muvunawufolamuniqvgs0.pdfIn PDF document text
    • https://satalediveli.weebly.com/uploads/1/3/4/0/134018026/3034368.pdfIn PDF document text
    • https://cdn.sqhk.co/sepokafaru/7fjdjaC/87269230073.pdfIn PDF document text
    • http://gojavodevagajuw.mygamesonline.org/13078367572.pdfIn PDF document text
    • http://vuwefedope.sportsontheweb.net/how_to_replace_first_alert_hardwired_smoke_alarm.pdfIn PDF document text
    • https://cdn.sqhk.co/xolafunodo/jhhg7N7/debalelubokipupoba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jisijuvod.myartsonline.com/60207879878.pdfIn PDF document text
    • http://vawujularow.rf.gd/47334418336.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/how_much_jail_time_do_sex_offenders_get.pdfIn PDF document text
    • http://gixejemazob.myartsonline.com/what_are_the_3_scrum_roles.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_off0000f9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D1 5832 bytes
SHA-256: 5d3e0313ceb9278233c3352d170100c424380d1d88250117d05034582e67c9b0
font_01_sfnt_off00010dbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBE 10408 bytes
SHA-256: 193a8829e2be04a5ce3aa142dc4b4108c60620d1b3d2d376bfb91d6d339b0d18

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