Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcd74763416d4467…

MALICIOUS

PDF

83.5 KB Created: 2021-02-04 00:40:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 44d425a92502d13ee968b95bf82bc886 SHA-1: f68d511f7a13209c4beb83e9d7505c98fa813abf SHA-256: dcd74763416d4467c63a110dff55a250482203b0ca09580d571014d83c5c40a3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, likely leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/123?utm_term=inverse+row+operations+calculator PDF link annotation
    • https://cdn.sqhk.co/guzunilepin/j4Cgeb3/drive_in_theatre_houston_mo.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/Skhd9EP/photomath_online_calculator.pdfIn PDF document text
    • https://cdn.sqhk.co/ravunovibuxi/Q1gegfu/fijosuvudigatalasemikijum.pdfIn PDF document text
    • http://hytri.com/2002_xterra_service_manualxl193.pdfIn PDF document text
    • https://cdn.sqhk.co/kizulajeli/jeAhihh/zajos.pdfIn PDF document text
    • http://logmeinnow.xyz/curso_de_negocios_internacionales_mincetur_2019ow5ch.pdfIn PDF document text
    • http://stalekost.site/macroeconomics_multiple_choice_questions_and_answersi04pr.pdfIn PDF document text
    • http://gitaxodepa.iblogger.org/mozilla_firefox_42_for_windows_7.pdfIn PDF document text
    • http://newonesitel.22web.org/wow_classic_arcane_mage_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/fusexabuvej/hjahj8B/major_mayhem_apk_2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ribuxuvotamu.rf.gd/import_data_from_excel_sheet_in_php.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/xofuzoputagavonorujufofi.pdfIn PDF document text
    • http://vupikefugogulup.epizy.com/15474561904.pdfIn PDF document text
    • http://vesoromu.epizy.com/bhagam_bhag_songs_bestwap.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22B 3040 bytes
SHA-256: a20bb4f408d8f784ad73c3448e4c5f25c27999cb50838481ad122ee355a0e39f
font_01_sfnt_off0000ed16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED16 5016 bytes
SHA-256: 8cb6d81608b4a92dabd829893975ff99ac1d95bd83045d63ea9297a4c13fc85a
font_02_sfnt_off0000fe49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE49 12384 bytes
SHA-256: 8b68af89bd32f482bbab657bf9e28f42486abc1a4091533108da192e7f17ce44
font_03_sfnt_off00012901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12901 16280 bytes
SHA-256: 01f4892c781a94bc330f8509b26c75aa068f6e63995424e3292ab07c90cc6491

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