Malicious PDF — malware analysis report

Static analysis result for SHA-256 5529f25f388df366…

MALICIOUS

PDF

75.3 KB Created: 2021-12-12 17:15:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-20
MD5: bd8774e4ef4467ff4ebe7a80092e3872 SHA-1: 7086916e28f4d0cd90160278f74c3b6a5a763eb5 SHA-256: 5529f25f388df366318c4e2d33162b3e879f072f1265e2ff3fa983369e55604b
206 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • 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 http://mvpvo.ru/userfiles/file/80442574938.pdf In PDF document text
    • http://mrs-edu.com/sribati/editor/uploadfiles/67698389983.pdfIn PDF document text
    • http://quaretti.it/userfiles/files/mexedujoxuzobugapud.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/15247461956.pdfIn PDF document text
    • http://tallygroupkwt.com/uploads/file/zanal.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/33771276085.pdfIn PDF document text
    • http://dr-onesrl.com/userfiles/files/pederurubawefakadirotivi.pdfIn PDF document text
    • https://clickbox.ro/images/file/korogozoziv.pdfIn PDF document text
    • https://ispartaprefabrik.com/ckfinder/upload/files/56890184336.pdfIn PDF document text
    • https://thefencedocumentary.ca/adminfiles/file/92877094378.pdfIn PDF document text
    • http://krakowska98.com/zdjecia/fck/file/makakigebunedelove.pdfIn PDF document text
    • https://textosolutionslinguistiques.com/upload/editor/file/xoduwemuzanij.pdfIn PDF document text
    • https://childrencareandliteracysociety.org/userfiles/files/vaxejafabebakajewinube.pdfIn PDF document text
    • http://armature.ir/cache/fck_files/file/1147201734.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/poniravalotolimupazi.pdfIn PDF document text
    • http://gymostrov.org/gymostrov/userfiles/file/79323787590.pdfIn PDF document text
    • http://www.martiusstaden.org.br/js/ckfinder/userfiles/files/foxijetidu.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161ab58469f218---7645040630.pdfIn PDF document text
    • https://webantikvarium.eu/tmp/vuragi.pdfIn PDF document text
    • http://scea.edu.mn/ckfinder/userfiles/files/37537316519.pdfIn PDF document text
    • http://wsospice.org/uploads/userfiles/file/file/33662247993.pdfIn PDF document text
    • http://venkateshservices.com/uploads/67582170148.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/u-9XGpgKpwY/uplcv?utm_term=reliable+vs+unreliable+sources+worksheet+pdfPDF link annotation
    • 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_off0000c234.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000c234.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC234 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_01_sfnt_off0000d8d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D3 17012 bytes
SHA-256: bc04e06c9b74823c1b57d3288e880b08b0438aad2d4b1b06e781d8408c094e9e
font_02_sfnt_off000104fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FD 11248 bytes
SHA-256: 9c2696241e852c760302219eee70712f14a40c608a16006d4bc2ca12bf58dbda