Malicious PDF — malware analysis report

Static analysis result for SHA-256 f657be714cd14388…

MALICIOUS

PDF

83.5 KB Created: 2021-03-21 09:52:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 69e01b82df063c35e46e605a9876cb88 SHA-1: b3c3c64ba4a615aec4cb62ad4766d45ca85cbeba SHA-256: f657be714cd143889060ae3a34eab91e702397d55023ad1ccd27771f95757d06
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-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://kuzutuzo.ru/123?utm_term=italy+visa+application+form+uk PDF link annotation
    • http://prodive.su/leggett_and_platt_100_series_adjustable_base_remotehow9i.pdfIn PDF document text
    • https://cdn.sqhk.co/gavezexu/il3jiSz/54878160370.pdfIn PDF document text
    • https://foravidamekog.weebly.com/uploads/1/3/2/3/132303307/posor.pdfIn PDF document text
    • http://sluzhba1.net/biophysical_techniques_campbellgl609.pdfIn PDF document text
    • https://cdn.sqhk.co/nazutupim/7qheVjj/itopia_apartments_st_pete.pdfIn PDF document text
    • http://naturfresh.fun/nuzumevisebekhd37.pdfIn PDF document text
    • https://xisofapetuv.weebly.com/uploads/1/3/4/7/134747578/wukuwamajuwilusizas.pdfIn PDF document text
    • https://cdn.sqhk.co/noneniwetav/jiviQih/classic_jumble_online.pdfIn PDF document text
    • https://zavurebugefogoj.weebly.com/uploads/1/3/4/3/134397626/jusupusivige_voded.pdfIn PDF document text
    • http://topcreditcheck.info/cheat_engine_6._4_softonicg5pwg.pdfIn PDF document text
    • https://mefirotevi.weebly.com/uploads/1/3/5/3/135314773/e11d5e54.pdfIn PDF document text
    • https://cdn.sqhk.co/karewura/jbBougc/ant_beetle_bite.pdfIn PDF document text
    • https://nakuzimatixibo.weebly.com/uploads/1/3/5/3/135388853/8a543c376edc13.pdfIn PDF document text
    • http://znasila.ru/ese_per_pushimet_dimerore36vjv.pdfIn PDF document text
    • http://merishwheelrecords.com/aplicacion_de_la_decantacion_en_la_vida_cotidianadvsvn.pdfIn PDF document text
    • http://gramnews.xyz/19809973273omsga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/91129179324.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66bb2b6b-991f-4dd3-9594-95d98aec4557/vezudajiwoxemu.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/reporting_loan_forgiveness_to_irs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5945619-1533-4a8f-a7d5-af176fe93936/lamborghini_gallardo_spyder_2008_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e382f32-93c2-48a6-8c6f-78fb40e15efc/conair_extreme_steam_fabric_steamer_with_dual_heat_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78ad3621-3eb7-4762-8554-304671c7d07c/keurig_vue_latte_pods.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/mazivupomapiwotaz.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_off0001060a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060A 5324 bytes
SHA-256: 84e720a995b0d718ae2924062e2ad09834686225cf88b5a31cdaa0780bad874e
font_01_sfnt_off00011825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11825 11780 bytes
SHA-256: 5fde0c02c8df9dd2e74cd9fd065ff7c2637e86ee43e7225bd2be098bd37c312d

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