Malicious PDF — malware analysis report

Static analysis result for SHA-256 b60c88ed9147f5c0…

MALICIOUS

PDF

37.8 KB Created: 2020-03-08 08:19:51 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d54c33af0846a234acb5e7543d066d56 SHA-1: fbdb3cb20e995b17960f0dc8e0ef1e00bea6663a SHA-256: b60c88ed9147f5c00341fc934d9ef22036d00f6435bfd15b73b3806a0b171436
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF document contains a large number of external links, many of which are dynamically generated and point to various domains. The primary lure appears to be medical information, specifically 'ICD 10 code for cervical lymphadenopathy', directing users to potentially malicious websites. The PDF_SEO_LINK_FARM heuristic indicates a mass linking strategy, common in SEO poisoning or phishing campaigns. The ML_NYX_PDF_MALICIOUS score of 0.999990 strongly suggests malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 http://bsa-sccc-pack301.com/uploads/1/3/0/7/130775853/130775853.html#icd+10+code+for+cervical+lymphadenopathy
    • http://inspirainteri�rkontor.no/uploads/1/3/0/5/130551331/kivajemamanazada.pdf
    • http://betterburner.com/uploads/1/3/0/5/130538937/midisuku.pdf
    • http://mail.smithsystems.us/uploads/1/3/0/5/130544313/mobisujimivozabo.pdf
    • http://www.mcaloonegroup.co.uk/uploads/1/3/0/7/130776031/denamepanokisaj.pdf
    • http://firtreeenterprises.com/uploads/1/3/0/2/130274281/29694.pdf
    • http://uservite.com/uploads/1/3/0/7/130739806/wegimup.pdf
    • http://cpanel.thesamplergirlstudio.com/uploads/1/3/0/5/130589348/4f9226e4c1db4.pdf
    • http://wifi-canada.org/uploads/1/3/0/7/130740627/2830887.pdf
    • http://odessawaterwell.com/uploads/1/3/0/5/130545957/fusemipozimerarogudi.pdf
    • http://marcelliswentz.com/uploads/1/3/0/6/130639836/zazuxitosu.pdf
    • http://www.bellplasterworks.com/uploads/1/3/0/4/130476129/131825.pdf
    • http://casachurba.com/uploads/1/3/0/6/130604523/3394761.pdf
    • http://kulshanclayworks.com/uploads/1/3/0/6/130604402/bonasir.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b6f.bin
de304c760c334bf0ba0f2f8fa3fd029ac29a69ca756c6702da5984a1fcb1bc36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6F 7932 bytes

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