Malicious PDF — malware analysis report

Static analysis result for SHA-256 88b57f40780d2b30…

MALICIOUS

PDF

72.0 KB Created: 2022-04-02 05:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-02
MD5: 1a4e07b51a5e82d7c497fd5fa5b3ed4b SHA-1: 10a3fda4734c700571e1a984b7b7dd35689baf09 SHA-256: 88b57f40780d2b301d5ea29f0d69fc1067481e5f0b967a9063dac47353731d36
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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://wirut.co.za/YmrXLWy8?keyword=hillsborough%20county%20schools%20hurricane%20days PDF link annotation
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/likeradize-javasezem.pdfIn PDF document text
    • https://groupunsur2.com/contents/files/dowujufemurozoza.pdfIn PDF document text
    • https://wemijixug.weebly.com/uploads/1/3/4/8/134888196/4577031.pdfIn PDF document text
    • https://xudiruxi.weebly.com/uploads/1/3/4/6/134630049/lapetunuravip.pdfIn PDF document text
    • http://starma.pl/files/file/tovaligitufuperafigol.pdfIn PDF document text
    • https://www.amata.org.uk/ckfinder/userfiles/files/gunedimakixitajimole.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/fofonobikinagomegurerema.pdfIn PDF document text
    • http://xn--9d0bk1sn6gncq95flql.com/user_data/kcfinder/files/26154012821.pdfIn PDF document text
    • http://stapi.org/assets/kcfinder/upload/files/3123640961.pdfIn PDF document text
    • https://toxoladosa.weebly.com/uploads/1/3/4/4/134479392/1223c3c66.pdfIn PDF document text
    • http://assotechne.eu/userfiles/files/91523869203.pdfIn PDF document text
    • http://pantipplaza.com/userfiles/file/kezasetilolutijuvu.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/suvaxisutivafeginukitugek.pdfIn PDF document text
    • http://portretnifotografie.cz/img-content/files/96717220128.pdfIn PDF document text
    • https://montpellier-business-plan.com/mbp/upload/images/images/upload/ckfinder/dobafokovodeleguguv.pdfIn PDF document text
    • https://zejinimab.weebly.com/uploads/1/3/1/8/131856072/lawojat_zabaz_bifabug.pdfIn PDF document text
    • https://wotakipinamiwug.weebly.com/uploads/1/3/4/6/134687545/fojisijijigekinedadu.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/91db4ce96ba3bce4106003980c513c9a/sukajetigunimifegat.pdfIn PDF document text
    • https://demujerifusa.weebly.com/uploads/1/3/1/4/131437649/kolujomesupigeguke.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/xubazebuwudebofukor.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_off0000b2df.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000b2df.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2DF 17576 bytes
SHA-256: 94cf887fb860a7e27fbdc1b73a0258cbfad657ebc3945648b6a6288f472ca376
font_01_sfnt_off0000e0fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF915 10992 bytes
SHA-256: 00e9fb9374f9555500d045991aa1d225d08071bb48b2cbc67faf5aaa1c405dce