Malicious PDF — malware analysis report

Static analysis result for SHA-256 4337997f98606187…

MALICIOUS

PDF

73.0 KB Created: 2021-03-01 22:55:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ea1cdfb1f96bae46c4494c695b17b03 SHA-1: 2e08130f5cfc1d440ea367844cd938136344cb12 SHA-256: 4337997f986061874f3a93c87a2e5185d4d3f7d82f6c0e8e3d0ed75a595db76d
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a malicious payload or redirect to a phishing site. The document body, though heavily obfuscated, contains keywords related to network device setup, suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/strik?utm_term=how+to+setup+linksys+wrt54g2
    • http://mowefopovog.mywebcommunity.org/29816143239.pdf
    • https://static.s123-cdn-static.com/uploads/4453144/normal_5feafc907589f.pdf
    • http://vitofemegawe.getenjoyment.net/60872281704.pdf
    • https://static.s123-cdn-static.com/uploads/4370089/normal_5ff5aa3080e81.pdf
    • http://mikrotikwizard.com/kadamban_tamil_movie_songs_free_starmusiqdpw4h.pdf
    • http://jojidasusesot.sportsontheweb.net/what_is_continuous_and_discontinuous_edge_in_slab.pdf
    • http://italiahot.space/463073098968ie9l.pdf
    • http://1xbet-regi.site/veterinary_histology_samuelsonta7ai.pdf
    • http://mutujejeturuduf.medianewsonline.com/how_to_cancel_enercare_hot_water_tank_rental.pdf
    • http://zdorovie-vashe-vse.xyz/74174843938urttm.pdf
    • https://cdn-cms.f-static.net/uploads/4448986/normal_5fd88ca133aa4.pdf
    • https://zogewuvenofo.weebly.com/uploads/1/3/2/6/132683334/195542.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nonabafat/mowolanew.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e017.bin
fa4d2578949ee0cf9a84cc5914b7f4a31ac5cbc61f1e396e836e2f73c54b9bce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE017 5340 bytes
font_01_sfnt_off0000f277.bin
c3831cfecff2ded615df0287b2fc70b85d27a847b7eafac8268fc2d369c2fcad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF277 10696 bytes

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