Malicious PDF — malware analysis report

Static analysis result for SHA-256 f69d628d921292ed…

MALICIOUS

PDF

37.9 KB Created: 2020-04-01 13:11:15 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: eca0ea391945c0fc5c004bff02901a36 SHA-1: 390955d90b814eb623a3075271203ca2f137d53f SHA-256: f69d628d921292ed2ec75db990ade1957ab43a66f056524515e81ec23cd0e20e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. The document body text, while containing a seemingly benign phrase, is heavily obfuscated and likely serves as a lure to the embedded URLs.

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://coloradosocial.us/uploads/1/3/1/4/131453132/131453132.html#islamic+dua+for+successful+marriage
    • http://saveourgame.org/uploads/1/3/0/8/130873893/18e6affbc84c4f.pdf
    • http://mymidwest.net/uploads/1/3/0/5/130550801/e9c37c24e79.pdf
    • http://decodingconflict.com/uploads/1/3/0/9/130970001/sefilu-vepitumosuwuf-mosekorakigubi-besofemoti.pdf
    • http://stefaniejosmith.com/uploads/1/3/0/5/130590671/66ebe21931.pdf
    • http://chadaohealing.com/uploads/1/3/0/9/130969987/1509670.pdf
    • http://mombodfitness.com/uploads/1/3/0/6/130621847/xatoruxolexaso.pdf
    • http://ameliafrancesfilm.com/uploads/1/3/0/4/130488544/ritigo-vejed.pdf
    • http://malloryholmes.com/uploads/1/3/0/6/130620863/4124024.pdf
    • http://jbrunstad.com/uploads/1/3/1/0/131070583/bumoro.pdf
    • http://geekswithdice.com/uploads/1/3/0/7/130739479/4563496.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_off00006e37.bin
43162e876473c5c4db5c8e280e9b85017ae50de8074e8a5f83bd9f4a854947e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E37 7316 bytes

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