Malicious PDF — malware analysis report

Static analysis result for SHA-256 63c63ab89765b61f…

MALICIOUS

PDF

42.0 KB Created: 2020-05-13 05:25:53 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 33de0b71334f2db09d7083eaabcd4f96 SHA-1: 4ff13d593b881ec40e0bdc9441805e249ec7e006 SHA-256: 63c63ab89765b61fdf07edbf05f0d97cdf25e9b91d70e1d97bc19d20b65b8851
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are numerically or generically named, suggesting a link farm or SEO abuse tactic. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. The ML classifier strongly indicated maliciousness, and the presence of numerous external links points towards a phishing or redirection attempt.

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://burleypta.org/uploads/1/3/0/7/130738845/130738845.html#brand+identity+guideline+pdf
    • http://ecologicair.net/uploads/1/3/0/5/130550715/gupawabagugagax_kurake_bipidowizuberag_petadomovev.pdf
    • http://synchronistproject.com/uploads/1/3/0/5/130543813/1825028.pdf
    • http://revisnotes.com/uploads/1/3/0/5/130550982/bcdffdbe033.pdf
    • http://tvtalkonradio.com/uploads/1/3/0/5/130589125/9629677.pdf
    • http://sevenfigureconsultant.net/uploads/1/3/0/7/130739126/jukibitonasud.pdf
    • http://cindycavallaro.com/uploads/1/3/1/4/131454683/7165b4a754d3938.pdf
    • http://tlckequipment.com/uploads/1/3/0/7/130776525/5654903.pdf
    • http://viaspros.com/uploads/1/3/0/5/130589220/c4f90b979ed.pdf
    • http://susancolours.com/uploads/1/3/0/6/130639400/kusog_mifotapepe.pdf
    • http://nyota-washnutrition.org/uploads/1/3/1/4/131483343/2ba9af9b729.pdf
    • http://fountainofimpactempowerment.com/uploads/1/3/0/8/130874114/3a09ce25b3.pdf
    • http://kikaonza.com/uploads/1/3/0/6/130620325/8040471.pdf
    • http://logcrafts1942.com/uploads/1/3/0/3/130379522/kukiwofuloj.pdf
    • http://shustercomedy.com/uploads/1/3/0/7/130740477/5875443.pdf
    • http://sharonbrownfitness.com/uploads/1/3/0/5/130588407/9529472.pdf
    • http://timesofmineralpoint.org/uploads/1/3/0/7/130740612/digugito.pdf
    • http://nysympathyfloral.com/uploads/1/3/1/4/131408618/tuxipizipep-pigasobijulu.pdf
    • http://kabobnkabob.com/uploads/1/3/1/4/131453395/3893922.pdf
    • http://joesperandeo.com/uploads/1/3/0/7/130775808/9648885.pdf
    • http://blueprintterra.com/uploads/1/3/0/2/130288399/629e400d.pdf
    • http://speechgiving.com/uploads/1/3/0/7/130739376/13782.pdf
    • http://healthinsurancethatyouneed.com/uploads/1/3/1/6/131637239/mefufuv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078b9.bin
25f4469b7a07b7668deb4371d847698639de22b6ac20de71ca225c3481b74310		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78B9 10320 bytes

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