Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4eff064fdf39a7c…

MALICIOUS

PDF

84.1 KB Created: 2021-03-18 03:13:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 28384fa56db1ea0adb5d25cd340b40ed SHA-1: e0863d06e4a8a1938ad611f6ac48525b6ca1ec60 SHA-256: e4eff064fdf39a7c15d29d62deaf0370a6346d16112619b5675bedef1336d02b
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, including one pointing to 'ponafet.ru' which is presented in a way that suggests a search result for commercial items. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm on disposable hosting, further supporting a phishing or malicious redirection scheme. No scripts were extracted, but the primary attack vector appears to be directing users to external, potentially malicious, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=used+craftsman+rear+tine+rototillers+for+sale PDF link annotation
    • http://kernig.online/luvemudalt181.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/ensefalopati_hepatik.pdfIn PDF document text
    • http://agent-ritual495.online/fajuduqd673.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451574/normal_6020554d15c8a.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/lusawaxukibetomowazokabel.pdfIn PDF document text
    • http://lowuwirakob.66ghz.com/how_to_show_data_on_pie_chart_in_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/gita_press_bhagavad_gita_telugu.pdfIn PDF document text
    • http://ontrade.top/417599667540djl0.pdfIn PDF document text
    • http://zofufina.22web.org/xikofurofetafelobiligitu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422620/normal_5ffd1db31c3a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407060/normal_602b5d50ab310.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458827/normal_5fefe577eeb3b.pdfIn PDF document text
    • http://8gusevshop.space/breitling_colt_chrono_ocean_manualri69g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490370/normal_5fd67dc721c41.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d36458f-fdf2-4ce1-af28-409cb38cc1e6/28189747960.pdfIn PDF document text
    • http://vomovawesojuti.epizy.com/77090088570.pdfIn PDF document text
    • http://pidawuz.epizy.com/national_diabetes_guidelines_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/269d82f8-d8f2-42e6-83a5-9aecf12b4bdb/38817949696.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c26b59b0-59f9-480c-8bc2-c05195af6f41/dekuxisirijemodixuwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffd3c3dc-d9d9-4b02-915b-239f5969c461/vovutuki.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF344 5160 bytes
SHA-256: ac9bda665b27b40434562f25a84fd6eaf6810c294c1c2f0130e3ffeaa9716634
font_01_sfnt_off000104bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BC 11668 bytes
SHA-256: 68ee600f276b1a586c3150deb43e80daab660df8ff64dbfc10d9c185bc37b627
font_02_sfnt_off00012c6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C6C 16332 bytes
SHA-256: 2a247a753e8a01f70d7fcfa74e2d7baad7259a755652018209d99d19020bd12c