Malicious PDF — malware analysis report

Static analysis result for SHA-256 230c10962fa41fbf…

MALICIOUS

PDF

81.1 KB Created: 2021-04-03 01:46:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 90308c394fa70e13a4352a805c0d7845 SHA-1: 57c7cc0c770eb850b49b6b44581f43686db86193 SHA-256: 230c10962fa41fbf8745d56a99fbdc2d70c2a59c88dfa190607f7dac61ffb4d5
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://crophysi.ru/strik?utm_term=mossberg+930+ratings PDF link annotation
    • https://cdn.sqhk.co/minamojazi/jYhfhev/mavetuvaduvirerape.pdfIn PDF document text
    • https://cdn.sqhk.co/naforokafe/jeoA7Ks/iphone_x_text_notification_sound_not_working.pdfIn PDF document text
    • http://tomandbxof.site/dufipifotolj0ixz.pdfIn PDF document text
    • http://clubstore.info/is_calcium_bromide_acidic_basic_or_neutral9ppj8.pdfIn PDF document text
    • http://lnstagramcopyrigtservice.com/mechanics_of_materials_7th_edition_beer_solutions_manualxcgjx.pdfIn PDF document text
    • http://5coupon.info/3992834386fiv9.pdfIn PDF document text
    • https://cdn.sqhk.co/vatomepipiw/ghhfHed/97739887132.pdfIn PDF document text
    • http://roman-holidays.shop/34260622027wgchb.pdfIn PDF document text
    • http://nowtorrentz.com/fixotelemebapogavetrrmf.pdfIn PDF document text
    • http://hytri.com/26733456975cye87.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zipoxibel.epizy.com/tamuxigaz.pdfIn PDF document text
    • http://savefativiluz.epizy.com/autonics_ct6_counter_timer_setting_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d57522ef-3cb6-44ef-aa23-0438c54c1813/famajemezek.pdfIn PDF document text
    • http://lugipivimefol.epizy.com/36698972540.pdfIn PDF document text
    • http://ravinod.rf.gd/xugifibexosije.pdfIn PDF document text
    • http://widadipadiv.epizy.com/81023707292.pdfIn PDF document text
    • http://xaxisavubuwowa.epizy.com/maharashtra_apartment_ownership_act_1970_in_marathi.pdfIn PDF document text
    • http://liwumakagizir.rf.gd/pepemiwu.pdfIn PDF document text
    • http://gaxufaxurawago.epizy.com/calendar_2019_week_numbers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea943304-c1d1-4d12-8314-4338c4fab361/74657750565.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_off0000ff7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7A 5428 bytes
SHA-256: 196fb94a970849ef1d295adc3a1f3b9b89566e77e7b8b8fd7d1c908aed41b977
font_01_sfnt_off00011201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11201 10564 bytes
SHA-256: cb2b4e25334664f6b2466a386347ab37e1bb7d3f12c9db166f154e29285417c8

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