Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f50d4641a2e0ec8…

MALICIOUS

PDF

70.7 KB Created: 2021-02-14 02:16:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 278658dd8473ebb125b4099038f0c07e SHA-1: df38e4d7d571c07035caf7a94dfd8d69e1654941 SHA-256: 5f50d4641a2e0ec8da57b2e37bf195d3a9f018127b01657143893053e06e28fd
206 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://maypoin.ru/wix?keyword=glendora+catholic+church PDF link annotation
    • http://xusibuvuzos.22web.org/utorrent_pro_free_full_version.pdfIn PDF document text
    • https://vixugusimuxomuj.weebly.com/uploads/1/3/0/9/130969476/3fcf3.pdfIn PDF document text
    • https://wuvumivew.weebly.com/uploads/1/3/1/4/131410662/punimupuze-lunuwesujefijop-lijabizenob-gubizizeraso.pdfIn PDF document text
    • https://kodabovoxalomas.weebly.com/uploads/1/3/5/3/135340354/kijowisapa-lejun-xiwomam.pdfIn PDF document text
    • https://sazuwigigaxav.weebly.com/uploads/1/3/1/4/131407293/fotomodirobi.pdfIn PDF document text
    • http://igme.site/maths_worksheets_for_adults_with_learning_difficultiesggfn4.pdfIn PDF document text
    • http://1xbets-regs.site/korinamowowijanisetiztqfcf.pdfIn PDF document text
    • https://nilelaji.weebly.com/uploads/1/3/0/7/130775665/zojikawi_kigaxizeraw.pdfIn PDF document text
    • http://epipog.com/66697925224eqe4k.pdfIn PDF document text
    • http://geesecam.com/1890985172tzzop.pdfIn PDF document text
    • http://luchdobro.site/biography_book_report_for_3rd_gradelhjla.pdfIn PDF document text
    • http://zoneeuro.pro/unlock_guided_access_on_ipadpe3ey.pdfIn PDF document text
    • https://kiligazifozu.weebly.com/uploads/1/3/4/5/134506598/560954.pdfIn PDF document text
    • http://chunyoo.com/livro_de_administrao_financeira_downloadxwkz0.pdfIn PDF document text
    • http://watutuwox.iblogger.org/64603741901.pdfIn PDF document text
    • http://pearhaidhr.fun/comic_book_guy_worst_ever_meme_generatore2o82.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bajokojukitipib.epizy.com/calma_remix_video_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/sinhala_nursery_video_songs_free.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_off0000d96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD96B 4880 bytes
SHA-256: 23ee9de4d8fc11c040809122e01ad7d355764342cd55b5aff0477e36472f39ae
font_01_sfnt_off0000e9f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F7 10772 bytes
SHA-256: 77dbfd92ead0f0d2a67e837e8321c0c68b0a4b452f45212c0a7a85e6a68041f8