Malicious PDF — malware analysis report

Static analysis result for SHA-256 95f0bde879de9888…

MALICIOUS

PDF

85.6 KB Created: 2021-02-28 07:31:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 67664b3cf59bbff9528eed8549332daa SHA-1: 29d908d099c6017e6f463481bf6405b1194cd698 SHA-256: 95f0bde879de98883b668f56c9ed595917718f57486c175a3aad7c373090069e
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable hosting services, suggesting it's part of a link farm designed to distribute malicious content or phish for information. The embedded URLs and the PDF structure indicate an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pelibifir.ru/strik?utm_term=us+navy+ranks+and+insignia+enlisted PDF link annotation
    • https://bupuzufemu.weebly.com/uploads/1/3/1/4/131452870/121622.pdfIn PDF document text
    • http://tesevamomavuruf.22web.org/thermo_king_magnum_plus_203_parts_list.pdfIn PDF document text
    • https://kikoxelila.weebly.com/uploads/1/3/4/3/134335894/puxivavememafa_luxaxe_bavajukisawi_mulazu.pdfIn PDF document text
    • https://misadedami.weebly.com/uploads/1/3/3/9/133997414/gejifujemurat-wolekopiwir-saset-zoxanuv.pdfIn PDF document text
    • https://sesogipe.weebly.com/uploads/1/3/1/4/131438268/defog_togirej_zafulikadefob_jewok.pdfIn PDF document text
    • http://yogist.fun/33464366352961zv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377101/normal_600813f04becc.pdfIn PDF document text
    • http://lifeshop.pro/55183545060lorln.pdfIn PDF document text
    • https://ligetivegivug.weebly.com/uploads/1/3/4/0/134041815/7878146.pdfIn PDF document text
    • http://nazhivy.net/34597016042gqgjy.pdfIn PDF document text
    • https://rofaxebawo.weebly.com/uploads/1/3/4/7/134750080/18598.pdfIn PDF document text
    • https://falumegobe.weebly.com/uploads/1/3/4/7/134702986/muketometezeliji.pdfIn PDF document text
    • http://infonewsuk.site/casio_ctk-720_driver_32_bit88ddf.pdfIn PDF document text
    • http://alsamcctv.com/kazizacehrw.pdfIn PDF document text
    • https://peketavapi.weebly.com/uploads/1/3/4/3/134331612/92fc57.pdfIn PDF document text
    • http://energytik.net/pretty_little_liars_book_set_1-16qcaga.pdfIn PDF document text
    • http://gayerkan.com/energie_cinetique_cours_3emelweqm.pdfIn PDF document text
    • http://gijutudubesakuz.iblogger.org/jurnal_azolla_microphylla.pdfIn PDF document text
    • https://vafobuzegigotot.weebly.com/uploads/1/3/0/7/130775214/841911.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://durunorutap.epizy.com/2018_cadillac_ats_sedan_owners_manual.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_off000112d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D4 5208 bytes
SHA-256: f2d40666286035fd20e6ca41ec969d1aa36fc17600dc1c832de45cb8c27cf772
font_01_sfnt_off000124ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124AC 10652 bytes
SHA-256: c5ba0ca67943cdc9e55313fa431e3abe13c7f8e290477c6156517db5d93ac8a5

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