Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebd1e3e999e1f678…

MALICIOUS

PDF

92.6 KB Created: 2021-03-20 18:59:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 3cf32929394475ef6bf6db66611f16b2 SHA-1: 3485f982be5ab1f120182cdb3e723f384bd1b061 SHA-256: ebd1e3e999e1f6784d48ec3986d924ae7458b2fd266c21f51c53e3aae6c986f5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous embedded URLs, many hosted on disposable domains, indicating a likely phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/strik?utm_term=matlab+iterate+over+array+of+strings PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378171/normal_5fd61e32b89aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388165/normal_5ffcf2914fd3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498376/normal_6011e17b88631.pdfIn PDF document text
    • http://ponojunuzed.iblogger.org/disneyland_map_2019_star_wars.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402000/normal_5ff6b8eec50d7.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/hjvhggt/91153140989.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383579/normal_5fda4567eaa7e.pdfIn PDF document text
    • https://cdn.sqhk.co/nolovojawek/hFDihgj/sunset_views_los_angeles.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391308/normal_5fe7cb0cae359.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372100/normal_5fdb9949d4280.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/dgggbig/93511079629.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418590/normal_600aecca2e504.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402520/normal_5fdecbe83fa66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447253/normal_5fe91720d17cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369512/normal_5fdf46b577a23.pdfIn PDF document text
    • http://xubixaxar.22web.org/top_hd_graphics_android_games.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pavabiza.atwebpages.com/lithium_ion_battery_diagram.pdfIn PDF document text
    • http://korofituzuxigu.onlinewebshop.net/38025137999.pdfIn PDF document text
    • http://pedamodaw.onlinewebshop.net/lexovafujevewafizukimip.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12745 5240 bytes
SHA-256: b08df8d7906dbb32980fc72cf1539dc22ffee68a2f4f32b2616c766e89eb98c4
font_01_sfnt_off00013947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13947 13320 bytes
SHA-256: 18d85ca64d505dd2c5b48762d70278da377bec542fb502c7ae7d3dc86a0fdd8d

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