Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d606af323d56450…

MALICIOUS

PDF

34.6 KB Created: 2020-04-11 10:18:38 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2352dde96f1b518cfc9a1a0fd4f6de16 SHA-1: 96beb53511d2ecb476bbdef1d9844dffce172007 SHA-256: 6d606af323d56450a2a781d8b8c394b8f6dd0d4f498e1de3e7557d772e5e53a5
96 Risk Score

Malware Insights

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

The PDF document contains a lure for a 'Spotify year subscription' and embeds numerous external links, many of which point to PDF files on suspicious domains. This indicates a likely attempt to redirect users to malicious content or phishing pages. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://74-123-77-223.mgwnet.com/uploads/1/3/0/8/130874645/130874645.html#spotify+year+subscription
    • http://miradorkitchenandhome.com/uploads/1/3/1/0/131070036/xewek_wipis_jejenif.pdf
    • http://meetthewirths.com/uploads/1/3/1/3/131383309/8803946.pdf
    • http://dkprogear.com/uploads/1/3/0/4/130489039/doduroxujakanaxa.pdf
    • http://tuen.fi/uploads/1/3/0/9/130969944/8504165.pdf
    • http://ama-qride.com/uploads/1/3/1/3/131398589/xosamuravanarop-wadawuwurekobod.pdf
    • http://skirksales.com/uploads/1/3/0/2/130287939/jezajoliz-fegopuribe.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_off00005d14.bin
25253a8801327edf02044a84c4a8bad83ab37b56a2b140f27be5cc0d11a23b77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D14 8292 bytes

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