Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eeaab8ef322f04d…

MALICIOUS

PDF

86.6 KB Created: 2021-02-14 22:09:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 776b57708408cf2b69a2987f160db983 SHA-1: 2824174b82afd776ceb27b958d46694a6af8c8d4 SHA-256: 0eeaab8ef322f04dbc1df9c33f4d6ca3161eaafdcac19e497e0bea09a47fc8b0
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It contains numerous embedded URLs, with at least one identified as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to search terms and application metadata, consistent with a lure document.

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://leonvi.ru/123?utm_term=universal+oil+filter+wrench+walmart PDF link annotation
    • http://fisusuwisefib.22web.org/rotasezevifofelabuz.pdfIn PDF document text
    • http://simupujumojata.22web.org/wemejozixuzaxalif.pdfIn PDF document text
    • http://keepxufi.space/28686279181ioc1d.pdfIn PDF document text
    • http://ozalupa.space/bridge_house_school_uniformh9ziz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493209/normal_5ff64a5467411.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377679/normal_5ff512cd1f9da.pdfIn PDF document text
    • http://boevoenlp.com/cxc_biology_past_papers6b62f.pdfIn PDF document text
    • http://vutanari.22web.org/feigenbaum_echocardiography.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jikeroti.epizy.com/defender_alpine_window_template.pdfIn PDF document text
    • http://kagokonutuvep.epizy.com/trello_project_management_templates.pdfIn PDF document text
    • http://jovawat.epizy.com/bksp_admission_2020_information.pdfIn PDF document text
    • http://sabukizazuse.epizy.com/98046558789.pdfIn PDF document text
    • http://zufisad.rf.gd/desperate_housewives_script.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11775 5264 bytes
SHA-256: 74f95cd85f62fce5aa50ae15ee5d98df548bbbde4f0fe4b01c6040ea2b8c9a92
font_01_sfnt_off00012951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12951 10596 bytes
SHA-256: 2c8f05409fbaf47030135f382830f2a958c13e568b513be45a5461fad51d4f50

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