Malicious PDF — malware analysis report

Static analysis result for SHA-256 e43d465997d52dbf…

MALICIOUS

PDF

146.2 KB Created: 2021-07-03 16:24:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: d838cc17f09a38e7382d1909a9fcccdb SHA-1: aa517bf686fb5a1213d47a8ab7157a87b127d6e9 SHA-256: e43d465997d52dbfb17b30736a327628344948e79d9b0c9416dff7cbebab7931
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous embedded URLs that form a link farm, pointing to compromised WordPress upload directories and disposable hosting. These links likely serve to redirect users to malicious sites for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://inwebjor.ru/uplcv?utm_term=phineas+and+ferb+into+the+second+dimension PDF link annotation
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/9a8f332b874a66887836a76a393aa488/59192578780.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608828924b4de---kegekakenuwubavuworegif.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a8300458060---29782385738.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/20745099896.pdfIn PDF document text
    • http://skylineidaho69.com/clients/c/c7/c7306e0a9cc1d421caefa9c307ca601f/File/bawopasorevowivorigolapoj.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160a119f8d5230---saxelenosaruga.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a14b75cbfd6---dobomorakupofoso.pdfIn PDF document text
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/163ea9509d73617a099d009a3bfac89d/23785178612.pdfIn PDF document text
    • http://envigest.cz/upload/file/54337905568.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/bd592f3d8f4443f69ab286d5961d9fbc/jegawexatonekuwologujuvi.pdfIn PDF document text
    • http://fullx.net/files/82233980857.pdfIn PDF document text
    • http://ongnuocdenhat.com/upload/files/bipomanibuludo.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e46b3a77e---4486871012.pdfIn PDF document text
    • https://mecaniquekd.ca/upload/file/gofixu.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ab546565ea9---52299936746.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160da932982403---xujotarixisitalaxazer.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/62947614001.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/a3915023c3738a28579bef0923f2f19c/41435908169.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/d5683d96b65af6f9367403ffebad60d7/18651514668.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/670dee7983fa61d832a60c7e949b5fee/jawugak.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6e0e9149c---79325753983.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa3a715230---40146465362.pdfIn PDF document text
    • http://dentish.ru/ckfinder/userfiles/files/tanako.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_off0001d509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D509 20312 bytes
SHA-256: 73f57eb247c496da02ac7f1817e5fc1695a19b45bce49eb29bf1090f3af6954e
font_01_sfnt_off00020a69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20A69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00022280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22280 10836 bytes
SHA-256: 8ff2062483bb200bbcf79435241c9550ff26d4c7f3758b3a7de597d58fcb7fe8

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