Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa81ca406f62d81c…

MALICIOUS

PDF

85.2 KB Created: 2021-10-13 13:53:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: 9d0a53684f51d4d655565ce467b25d55 SHA-1: 7b6f227d3ba122db758086c527089a34a22e675f SHA-256: aa81ca406f62d81c0a17d08dfd82ad23e5d275b796f338a4f352c2f380196cea
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://garglob.ru/uplcv?utm_term=math+division+answers PDF link annotation
    • http://abpaluso.com/upload/file/vosivizijos.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/lafr8p6bcgi7rh22olr7hiao75/79883214142.pdfIn PDF document text
    • http://chapaconoticias.com/assets/ckfinder/core/connector/php/uploads/files/65776783013.pdfIn PDF document text
    • http://www.farmaciapenil.es/userfiles/files/7525875251.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16155a38153337---ridej.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/b752e1d06016a94b7748f7cc201c44de/jozitivuv.pdfIn PDF document text
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/jusedeva.pdfIn PDF document text
    • http://nguyenxuanhuong.com/upload/files/pamozogosofajodesogixoxa.pdfIn PDF document text
    • http://analhospital.net/file/files/kipusesotixipipobire.pdfIn PDF document text
    • http://speakingaboutnetworking.com/ckfinder/userfiles/files/9690343997.pdfIn PDF document text
    • http://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/luderebabegonaroni.pdfIn PDF document text
    • https://0922.sproname.com/files/userfiles/files/6045262533.pdfIn PDF document text
    • http://slabowidzacy.smprzemysl.pl/ckfinder/userfiles/files/fuxaragutalogovojinesob.pdfIn PDF document text
    • http://kompletucetnictvi.cz/files/file/sunavu.pdfIn PDF document text
    • http://coolscape.info/images/files/47380759052.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16132cb181af79---8996871349.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/naxebetokominuwi.pdfIn PDF document text
    • http://primaria-ciocirlia.ro/media/file/9068273800.pdfIn PDF document text
    • http://paradoxine.com/upload/files/54516990313.pdfIn PDF document text
    • https://postelezmasivu-ostrava.cz/ckfinder/userfiles/files/20997973733.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1615576ea51e96---rekokubekumatenip.pdfIn PDF document text
    • http://bouwbedrijfansing.nl/userfiles/file/lexopamapi.pdfIn PDF document text
    • http://ecolservizinettuno.com/userfiles/files/68667617148.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/bovojexurusukijadegad.pdfIn PDF document text
    • https://fratellifurloni.it/file/74253072028.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_off0000e3e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E0 19600 bytes
SHA-256: 361f07675bc053ecb2703ad06258e1a3ecf00fee2a83aad3dc7b0611c77ed38c
font_01_sfnt_off00011760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11760 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F77 10444 bytes
SHA-256: e6ef8b99195ddf9748e28a69a98912b0578c4d460a1bffaa21eaf62cdc15e737