Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa831ae7c917369a…

MALICIOUS

PDF

81.7 KB Created: 2021-09-13 00:32:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: 8e53fd8f3f80b2c4795d3b9f9feeaae3 SHA-1: 5d4519e57de22f7ebeb5142c14c73426af5ac8db SHA-256: aa831ae7c917369a21e7c8f3b9c3729fb981c1484a7ba7147dd20f9cfff89b52
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613af3aa94444---fokufidadinejigosovasu.pdf In PDF document text
    • https://elperrocallejero.info/ckfinder/files/lupupamurotojugojagurinef.pdfIn PDF document text
    • http://areopag-group.ru/sites/default/files/uploads/resasorakelowolavu.pdfIn PDF document text
    • https://crcnueva.naturasoftware.com/uploads/images/files/92927275575.pdfIn PDF document text
    • http://poliinc.com/upload/files/vapisogitoparixijaweripiv.pdfIn PDF document text
    • http://studiotravenzolo.it/userfiles/files/badixiduguropiwalikej.pdfIn PDF document text
    • http://dongsimkindergarten.com/upload/files/81644605295.pdfIn PDF document text
    • http://boston.pl/fck_pliki/file/zemuzizanogegogos.pdfIn PDF document text
    • http://nedvizhimost-v-sharm-el-sheikhe.ru/uploads/files/rojoziwulikimuridotozudu.pdfIn PDF document text
    • http://smsgurugram.com/miet/assets/files/49752801659.pdfIn PDF document text
    • https://vresponse.net/userfiles/file/xonogumigezaxaliw.pdfIn PDF document text
    • https://impulsa.mantareys.net/uploads/plantillas/files/sitawizexugegixusukev.pdfIn PDF document text
    • http://combatkuntao.com/ckeditor/ckfinder/userfiles/files/171388552.pdfIn PDF document text
    • http://thailaundry.com/imgUpload/files/4420117009.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613da3dd421cd---86580607380.pdfIn PDF document text
    • http://ldkxzzs.com/images/userfiles/file/tiloj.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/13992038907.pdfIn PDF document text
    • http://meta-min.com/files/lakavuwuzezizelabuvamelo.pdfIn PDF document text
    • http://parmalab.it/userfiles/files/tizikunakixonejogolut.pdfIn PDF document text
    • http://robbes.nl/media/files/janoxunigekawojepukedazo.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/0palsartmjm67igioo2qooj247/44245279279.pdfIn PDF document text
    • http://fecoil.com/userfiles/file/xirixixudaki.pdfIn PDF document text
    • https://ceccarmehedinti.ro/userfiles/file/50149568658.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=cast+for+die+hardPDF 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 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_off0000d94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94E 10332 bytes
SHA-256: 739c17b374933dc8da5303375957c2e82f0ba3465ed15b305e5a00d444baa537
font_01_sfnt_off0000f0c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C3 18688 bytes
SHA-256: 003b53d1aa3adc31d47dc0e1910ad36f7a3d80c2881cf3da93dc1d1da02d6096
font_02_sfnt_off000121a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1