Malicious PDF — malware analysis report

Static analysis result for SHA-256 552cd78d81f49a6d…

MALICIOUS

PDF

92.1 KB Created: 2022-04-12 11:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-20
MD5: cd8f6ceadf9ce37bc1db8411cd4b30c2 SHA-1: 8c6d6ce608ec787aa8cc6d818712903ba7d953f7 SHA-256: 552cd78d81f49a6dc049c0a27c7dcc602e9e4adbbed84b3a496c4ebff782b2bf
206 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://podar.co.za/YmrXLWy8?keyword=is%20a%2030%20minute%20workout%20enough%20to%20build%20muscle%20reddit PDF link annotation
    • https://lufty.cz/UserFiles/files/3423975305.pdfIn PDF document text
    • http://www.dawnrotaryclub.tw/UserFiles/files/82775849981.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/omhh3m5pvrgdnh7sfm21sr0ia0/90415785532.pdfIn PDF document text
    • https://webrobogo.hu/kepek/xudipetanuzuku.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1623069e1a9d80---81827118457.pdfIn PDF document text
    • https://rekazisiw.weebly.com/uploads/1/3/0/8/130874265/a7f0e6171881.pdfIn PDF document text
    • https://sunivisoxeban.weebly.com/uploads/1/3/4/4/134493344/c1b8967c8e0a8d.pdfIn PDF document text
    • http://www.perlodrink.com/documents/20602675558.pdfIn PDF document text
    • https://pezefipagezag.weebly.com/uploads/1/3/4/8/134883300/6175449.pdfIn PDF document text
    • http://ranfeng.com/userfiles/file/2022-2///2022216657256195.pdfIn PDF document text
    • https://xuratofojiwob.weebly.com/uploads/1/3/4/0/134096374/5627957.pdfIn PDF document text
    • http://entryexpress.online/chapter_images/files/zinirinefexigafo.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/deguwu.pdfIn PDF document text
    • https://dawoxojukuput.weebly.com/uploads/1/3/4/8/134890950/sebelo_releleferufo_tuvad_kulisawuso.pdfIn PDF document text
    • https://szerokiewody.pl/files/files/vofazabatovifuribid.pdfIn PDF document text
    • https://vawufavatipox.weebly.com/uploads/1/4/1/2/141289786/34657.pdfIn PDF document text
    • http://bycongroup.com/UserFiles/file/xebatexonegu.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/40537813935.pdfIn PDF document text
    • http://www.procuradoresgipuzkoa.com/js/ckeditor/kcfinder/upload/files/56037539004.pdfIn PDF document text
    • http://bundoreh.com/fckeditor/files/file/romav.pdfIn PDF document text
    • https://kikokemez.weebly.com/uploads/1/3/5/3/135331375/kotetedukupi-bujaji-zarizazig-megugukibabur.pdfIn PDF document text
    • https://nakipubupuloda.weebly.com/uploads/1/3/4/5/134589887/zifibimivupem.pdfIn PDF document text
    • http://yusungchart.com/userData/board/file/7481341143.pdfIn PDF document text
    • http://polethique.ch/uploads/files/vudulibebixukubowuninu.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_off000101f7.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off000101f7.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F7 17200 bytes
SHA-256: d515f2334a3b7ecd5cbc23c1d26691c3a83743f20c0b378c130221a1e02a1540
font_01_sfnt_off00012ec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC4 11480 bytes
SHA-256: c63961ad6e586e6a211f402bf0e133c33ee95f231229ed6bdd7a3fb9a382cdb1
font_02_sfnt_off00014995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14995 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1