Malicious PDF — malware analysis report

Static analysis result for SHA-256 552b4ece0ea54357…

MALICIOUS

PDF

378.2 KB Created: 2022-01-07 15:16:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-19
MD5: bcf12e7132e2bfde8770d320ca6e6e8a SHA-1: 9521c2790ebb3cb6b468f964efbf97fe9ff16288 SHA-256: 552b4ece0ea54357b11719555050e415cefd2616d2ff681fce95d21377b5e40c
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7525

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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 http://njbeihang.com/uploadfile/file///2021110120170612.pdf In PDF document text
    • http://armature.ir/cache/fck_files/file/mupigoseg.pdfIn PDF document text
    • http://lionsmarsala.it/userfiles/files/9310247809.pdfIn PDF document text
    • https://www.bosingels.nl/ckfinder/userfiles/files/posubepezex.pdfIn PDF document text
    • https://vietcuongcorp.com/uploads/news/files/pajuvijuk.pdfIn PDF document text
    • https://tsydesign.com/userfiles/jws/files/96664713252.pdfIn PDF document text
    • http://trip-sale.ru/userfiles/file/wivegizujiwixaribex.pdfIn PDF document text
    • https://erdenetpost.mn/userfiles/files/kudabiwuxapumosusago.pdfIn PDF document text
    • http://sancheonglittletheaters.com/upload/userfiles/2021/12/files/211231001906.pdfIn PDF document text
    • http://vidol.eu/userfiles/file/fadovobifigid.pdfIn PDF document text
    • http://klm-co.ru/foto/ck/files/fikonagoxumo.pdfIn PDF document text
    • http://www.wiseyoga.nl/kcfinder/upload/files/5855642416.pdfIn PDF document text
    • http://lexprikson.com/admin/style/images/userfiles/file/titemegol.pdfIn PDF document text
    • https://palacioquintin.com/upload/editor/file/11579704007.pdfIn PDF document text
    • https://www.nitdgp.ac.in/uploads/userfiles/files/lopiwopufenawu.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/pemegili.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8c7083647---donetawetox.pdfIn PDF document text
    • http://healingtown.org/userData/board/file/61373052720.pdfIn PDF document text
    • http://upservice.expert/admin/ckfinder/userfiles/files/juden.pdfIn PDF document text
    • http://biogenetec.tw/image/files/20220105_072250.pdfIn PDF document text
    • https://primer-spb.ru/files/files/48284461161.pdfIn PDF document text
    • http://bamor.org/userfiles/file/goges.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/Z3ufxtS7Wvw/uplcv?utm_term=architecture+portfolio+template+pptPDF link annotation
    • http://job.nspu.ru/ckeditor/kcfinder/upload/files/gefej.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://dejavu.sourceforge.netIn extracted file (font_00_sfnt_off000580e8.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off000580e8.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000580e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x580E8 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_01_sfnt_off0005978c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5978C 10556 bytes
SHA-256: 68cd7d310c516a8a009a5f494afd5852196d9e33593c51a6bc7b6631dc0724be
font_02_sfnt_off0005af9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AF9C 16236 bytes
SHA-256: 5fc17ea47cac381949affb08ed97d0a141df0b3ba6cead99e703124e4b7cbd09