Malicious PDF — malware analysis report

Static analysis result for SHA-256 fefa95d62f489951…

MALICIOUS

PDF

44.6 KB Created: 2020-06-03 20:40:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1dc95ac06da127bcb3ad9fc44e0624ae SHA-1: e166cf001704117cdc1636df577ebae8a79b84c2 SHA-256: fefa95d62f48995153d98208d18f2bf0e21e9674f2b5bd1ee011345b2ca75b5f
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. The embedded URLs suggest a link farm or SEO poisoning attack, aiming to direct users to potentially harmful content. No scripts were extracted, limiting the analysis of direct execution capabilities.

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://colddiamnd.com/uploads/1/3/0/4/130488940/130488940.html#trump+home+alone+2
    • http://mail.fccbusiness.com/uploads/1/3/1/0/131070619/kexatukojimafer-zesum-razaxunes-gubatabixiveneb.pdf
    • http://mostowing.net/uploads/1/3/1/3/131379402/dabag.pdf
    • http://confidentrider.co.uk/uploads/1/3/1/4/131483194/e24d28d46fa5679.pdf
    • http://bodyandmindinmotion.com/uploads/1/3/0/2/130288514/4935826.pdf
    • http://dalitleon.com/uploads/1/3/0/5/130590312/1323206.pdf
    • http://abettertravelagency.com/uploads/1/3/1/3/131381518/6077745.pdf
    • http://webinarjam.eu/uploads/1/3/0/4/130490687/2636624.pdf
    • http://pedicure-an.com/uploads/1/3/0/5/130589998/lariwekedewatixubedi.pdf
    • http://colddiamnd.com/uploads/1/3/0/4/130488940/terms.html
    • http://colddiamnd.com/uploads/1/3/0/4/130488940/dmca.html
    • http://colddiamnd.com/uploads/1/3/0/4/130488940/policy.html
    • https://mokabax.files.wordpress.com/2020/05/mabaxolamobitimorel.pdf
    • https://bujamabak.files.wordpress.com/2020/06/43342841014.pdf
    • https://fadadidigar.files.wordpress.com/2020/06/vexemosodixitawokitaro.pdf
    • https://vaxogesazefo.files.wordpress.com/2020/05/xazotizovedexanufa.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c04.bin
22fdb07edbb650fb452e96251dc9e10decba9399fd807810dcd246b7d4a625be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C04 10836 bytes
font_01_sfnt_off0000913a.bin
c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449		 pdf-font-stream PDF embedded font (sfnt) at offset 0x913A 16204 bytes

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