Malicious PDF — malware analysis report

Static analysis result for SHA-256 431d4bd602c58861…

MALICIOUS

PDF

70.7 KB Created: 2021-02-27 18:19:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0863bcef21f53304ddc8726d73fa976b SHA-1: d5a38c03508391dca15e31ade6cd335060b99930 SHA-256: 431d4bd602c58861c54f79a18b741e4c52ff3593c7d58519dd88097f59f99a81
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URI pointing 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 suggest it's designed to exploit user interaction, likely through a spearphishing attachment, to redirect to a malicious site.

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://jumiwimov.ru/wix?keyword=the+legislative+branch+crossword+answers
    • http://trackengine.host/descriptive_adjectives_worksheets_5th_gradevnjpi.pdf
    • http://simkosa.website/83966231454yjhtw.pdf
    • http://retoxebed.22web.org/airlift_movie_480p.pdf
    • http://ccckkkkk.space/939610654035dsuj.pdf
    • http://esclub.pro/doxipalaku6ifdy.pdf
    • http://meletemobu.iblogger.org/69357924976.pdf
    • http://azules.ru/dunamo1rij0.pdf
    • http://zabidegelid.iblogger.org/12357042175.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://liroporuki.myartsonline.com/fz_bike_new_model_2017_mileage.pdf
    • http://terexibuf.epizy.com/vibuvoga.pdf
    • http://kavibajegis.onlinewebshop.net/99199101525.pdf
    • https://s3.amazonaws.com/wixatax/nibudakeladifutuga.pdf
    • http://zinuforonubas.rf.gd/fuwilitepoladivejuko.pdf
    • http://bapexuzajo.epizy.com/nujuxudi.pdf
    • http://lesizemub.epizy.com/chachi_420_ringtone.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_off0000d7ce.bin
4cf9f22cb3dd19d6d04143e419f84202647e5de4133f9c1d367e47e8c1aef44b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CE 5440 bytes
font_01_sfnt_off0000ea5d.bin
63f77db95b9f89a91e76c48544918d424c2de30482fcf6157f68bad96fdbda9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5D 10380 bytes

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