Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ff32464d9f3190e…

MALICIOUS

PDF

73.7 KB Created: 2021-03-22 10:03:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: de5ffb2101a43a62f8ed4fcef8cc150e SHA-1: 9f80226b46e276b7ce6bd6e7a4c38d4db214394d SHA-256: 1ff32464d9f3190ea4e63e1603ba2784a9931ffcdde40c0252dc453fc184ebac
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 0.9993

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://zajinet.ru/123?utm_term=asce+journal+manuscript+format PDF link annotation
    • http://votixowet.22web.org/xobodotatevokugilejeze.pdfIn PDF document text
    • http://begigemiwite.22web.org/gopuxevolafovotilava.pdfIn PDF document text
    • http://golosa-spasibo.ru/bose_qc15_battery_door_replacementst9xy.pdfIn PDF document text
    • http://marafonsport.site/towevgj6fx.pdfIn PDF document text
    • http://badge-verification-center.com/advantages_and_disadvantages_of_social_networking_wikipediapv980.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424025/normal_6035b4e2c1344.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453551/normal_5ff55ded45b01.pdfIn PDF document text
    • http://womenit.space/puwekumefijatrgo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376875/normal_6009aa02a46a4.pdfIn PDF document text
    • http://pefilimozol.iblogger.org/57247913546.pdfIn PDF document text
    • http://italywom.space/inteligencia_emocional_audiolibro_en_espaolf0vml.pdfIn PDF document text
    • http://info-pages.ru/stihl_weed_eater_string_wont_feedhbwx0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494866/normal_6014b036a6565.pdfIn PDF document text
    • http://razvivatel.blog/wudevaxozafigalazgfa9o.pdfIn PDF document text
    • http://gratoraama.website/trending_videos_best_pimple_pop_ever0zol8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416661/normal_60445a91ea215.pdfIn PDF document text
    • http://magnitoli-2ekran.site/newblue_transitions_3_ultimate_crackceec2.pdfIn PDF document text
    • http://kyrgyztours.com/camera_test_chart5dsff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lojiwifi.epizy.com/pes_17_android_version.pdfIn PDF document text
    • https://ae26bae5-b1f3-4fb2-a0ba-5d2f2d23988c.filesusr.com/ugd/aec2ea_e283ad0ff6bf44abaf3fefd3eb68e801.pdf?index=trueIn PDF document text
    • https://def05634-b969-4265-beeb-1e7d695e9a44.filesusr.com/ugd/6865ce_3652a4a06d0d4d56a2cfaf9beb7024bd.pdf?index=trueIn PDF document text
    • http://ribitotuv.epizy.com/add_mixed_numbers_worksheet.pdfIn PDF document text
    • http://roxudafemif.epizy.com/28834976022.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_off0000e192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE192 5224 bytes
SHA-256: 9f3b522d366ffd06f26c97de483a476d31d4e9c6ee54eda72d32aa13458d661c
font_01_sfnt_off0000f34a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34A 11276 bytes
SHA-256: 10b5dc3099b25594477302461e0c546eadea823a956e87dcbb6c8a4e661299ae

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