Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff9dd675468d7869…

MALICIOUS

PDF

73.3 KB Created: 2021-03-11 08:15:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c2a862992bfea247a8b35214ec8d45ab SHA-1: 17ebe347e8efcba0b3901341d1c4580220713d2f SHA-256: ff9dd675468d7869158d921ad1735550c413edb1d0b85d7bf0d0d4cb0f2249ac
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 as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable domains, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to 'nutrition exam questions and answers'. The presence of external URIs and link farm heuristics further supports the attack pattern.

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://resalured.ru/wix?keyword=nutrition+exam+questions+and+answers PDF link annotation
    • http://wixosefimaba.scienceontheweb.net/daruzisefidudukoduke.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491673/normal_5fff14f8b2969.pdfIn PDF document text
    • http://fulokixowo.scienceontheweb.net/8087208891.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373779/normal_5fe810f257521.pdfIn PDF document text
    • http://pumaguli.scienceontheweb.net/python_set_environment_variable_for_subprocess.pdfIn PDF document text
    • http://tokudujadi.medianewsonline.com/85481323538.pdfIn PDF document text
    • http://winoxolupuvil.getenjoyment.net/n1996_motherboard_connections.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495976/normal_5fd646e1f1576.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/tigigi.pdfIn PDF document text
    • http://mavaxur.mywebcommunity.org/desoridej.pdfIn PDF document text
    • http://kitafoged.medianewsonline.com/1957231910.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483354/normal_6026ea8b87ad7.pdfIn PDF document text
    • http://pazadixokumox.sportsontheweb.net/dell_latitude_e7450_power_connector.pdfIn PDF document text
    • http://mukinumatonewo.getenjoyment.net/91846888483.pdfIn PDF document text
    • https://cdn.sqhk.co/wodaximewule/aFheHhd/xarezuwosuxipulitos.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/533a9076-6c8e-4189-aca2-b041dd3737df/malcolm_gladwell_the_tipping_point_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e6e76b1-a1ab-4365-9125-e0379b649421/89708360807.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_off0000e2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E9 5196 bytes
SHA-256: a6c6b624385d396a76a7fc5d3f5555a4e8cff11609f34acaedbc451e2fbc6ba2
font_01_sfnt_off0000f48d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48D 10364 bytes
SHA-256: f74ac976bcf4a5e763d7d92080dc735dda801b78ab2d5b7026c4cc36fa994abf

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