Malicious PDF — malware analysis report

Static analysis result for SHA-256 a83f708343cbc63a…

MALICIOUS

PDF

77.8 KB Created: 2021-02-17 08:45:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 336805a8abfa8068d47598e8d9dd25ad SHA-1: 2e700ea9fe9d2fbd6261173f29c414cf1e2e78ca SHA-256: a83f708343cbc63a2205ed3595421d16963bb1e4e05b96610b829cc333884b99
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that redirects to a malicious domain, likely intended to deliver a secondary payload or phish for credentials. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to exploit vulnerabilities or trick users into navigating to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=how+do+you+clean+the+filter+on+a+samsung+washer
    • https://cdn-cms.f-static.net/uploads/4415950/normal_5fdc0f26e8f7a.pdf
    • http://help-feedback-amzn8.xyz/tedeperomita7plh7.pdf
    • https://cdn.sqhk.co/sunomedude/Qjihbjj/tizekuxufijademabu.pdf
    • https://static.s123-cdn-static.com/uploads/4493549/normal_5feecf0ebbd31.pdf
    • https://static.s123-cdn-static.com/uploads/4454819/normal_5ff575d33d023.pdf
    • https://cdn-cms.f-static.net/uploads/4389085/normal_5fe8b17d86e46.pdf
    • https://cdn-cms.f-static.net/uploads/4421969/normal_5fe7e61ab1074.pdf
    • https://static.s123-cdn-static.com/uploads/4406456/normal_5fcb239ced692.pdf
    • https://cdn-cms.f-static.net/uploads/4415051/normal_5fd94982a72a7.pdf
    • https://static.s123-cdn-static.com/uploads/4445573/normal_6003dfe36786c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://zawemitop.epizy.com/bootstrap_templates_html5_free.pdf
    • https://s3.amazonaws.com/jevopemosod/48814786151.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e573.bin
834f28d6c6422dfdf9eb8c4bd3179072314111f05b0195977146ee9a2ba61aa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE573 5472 bytes
font_01_sfnt_off0000f7f5.bin
de86a445d1dff912c6d79870b4da83c5ca023c44a83f881b934fef48ce271d81		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F5 10376 bytes
font_02_sfnt_off00011b72.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B72 4324 bytes

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