Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea28a34ee0803076…

MALICIOUS

PDF

42.8 KB Created: 2020-04-19 06:27:35 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 248232c5aebae8baac6d9a7fc381161a SHA-1: 3e92d3614fe5ac3f64080e65f66f15baa9ff6d36 SHA-256: ea28a34ee08030768de4f4d2663154160d8b05d48556750412de74edfc63bfa0
96 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, a common tactic for SEO link farms or to redirect users to malicious sites. The document body, though heavily obfuscated, contains text suggesting an 'Authorization form rto', which, combined with the numerous external links, indicates a phishing or credential harvesting attempt. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a 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://eyelovies.com/uploads/1/3/1/4/131438767/131438767.html#authorization+form+rto
    • http://truckdiva.com/uploads/1/3/0/5/130588425/5589744.pdf
    • http://clbart.com/uploads/1/3/0/8/130813320/f4432ad62.pdf
    • http://alexandraforsythermt.com/uploads/1/3/0/8/130814774/8622f20bc6.pdf
    • http://craftbaked.com/uploads/1/3/0/6/130604987/babibomitebe.pdf
    • http://greenlightworkshop.com/uploads/1/3/0/6/130605357/moziruwo_vigizukedepet_livuwera.pdf
    • http://atwatervillagepsych.com/uploads/1/3/0/2/130289601/04e08.pdf
    • http://whitmancustomdesigns.com/uploads/1/3/0/6/130604466/3995298.pdf
    • http://adobeforfashion.net/uploads/1/3/1/3/131379189/vulidajaporefeveraf.pdf
    • http://narmermarine.com/uploads/1/3/0/4/130435842/gikisowomenomapuzu.pdf
    • http://wlaservices.com/uploads/1/3/0/4/130483918/xizatekoke.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_off0000729d.bin
eadbbbfd1a2ea81cd51532106e207f01fa621879e1e390ebd5cf051578b6451a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x729D 7476 bytes
font_01_sfnt_off00008fe4.bin
21c081c601f7a9d922326fd9cdb817eddda87ef78f5e69df0eeec30a56cc2ccd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE4 4324 bytes

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