Malicious PDF — malware analysis report

Static analysis result for SHA-256 44529ce80fac4e18…

MALICIOUS

PDF

69.3 KB Created: 2021-09-14 00:43:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: 71b0050b07df9e16b1c4de6824aedd94 SHA-1: 5fdfd272c5fada3c5e1ca174d3b29586ea96c2f3 SHA-256: 44529ce80fac4e188cff0348e7cd04bc92dcd9ebb652ef6e7657131660272b94
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, with one heuristic specifically identifying it as a link farm on disposable hosting, suggesting a phishing or malware distribution lure. The presence of embedded URLs and the PDF structure point towards an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • 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://irlanc.ru/uplcv?utm_term=raft+survival+multiplayer+apk PDF link annotation
    • http://dd-eng.com/files/files/42468135848.pdfIn PDF document text
    • http://anapharmata.hu/ckfinder/core/connector/php/files/41070039824.pdfIn PDF document text
    • http://movitecnic.fr/ressource/site-image/files/virugup.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b40400102e---nogomu.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/ligogipulexikemu.pdfIn PDF document text
    • http://brixtontaxi.com/survey/userfiles/files/26869964209.pdfIn PDF document text
    • http://airsoft1.ro/files/file/90458717693.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/59601608230.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/86730946801.pdfIn PDF document text
    • http://cavusofis.com/images_upload/files/turazegopevikesi.pdfIn PDF document text
    • http://ijfbn.com/editor_up/numobufokipo.pdfIn PDF document text
    • https://sagarexpress.com/userfiles/file/dududanewawoxovijefuvunax.pdfIn PDF document text
    • http://marcus-1.com/FileData/ckfinder/files/20210906_66A1CE23EB6FBEF5.pdfIn PDF document text
    • https://ln80.cn/filespath/files/20210903031539.pdfIn PDF document text
    • http://mayinmaunhat.com/upload/files/vagilijijevisisarutezajo.pdfIn PDF document text
    • http://pokrowce-ochronne.pl/Upload/file/40243334396.pdfIn PDF document text
    • http://fabiocaronearchitetto.com/userfiles/files/foraz.pdfIn PDF document text
    • https://pre-www.bridge-academy.com/uploaded/ckeditor/files/xuwodimefaxolet.pdfIn PDF document text
    • http://gesundheit-im-blog.de/userfiles/file/wujawederimariroluseluso.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/16138c14004426---14360932843.pdfIn PDF document text
    • http://abwwilson.com/uploads/files/ganodu.pdfIn PDF document text
    • https://hondaotohaiphong.vn/upload/files/sezarerekusokesawosalowo.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 PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB112 10712 bytes
SHA-256: 779657c14f739864d29ec8a8ea44e8b589352ac166ee7f610e9ab032f07d2473
font_01_sfnt_off0000c9c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e1d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D7 14940 bytes
SHA-256: d49795095c12f5dce5100d59bd4b354c0ba592d074565c38b4cd059bcb51d314

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