Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fb266d2a2f84d15…

MALICIOUS

PDF

41.6 KB Created: 2020-04-07 15:46:51 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b6f9bd7b7b60d5a4e23db2884c1a477f SHA-1: cb21082bd9392cf1bf8dd8c1d000def52a9e7374 SHA-256: 4fb266d2a2f84d1506e023d7e7ee851b87dbc09397e654b12213eb42c4284406
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDFs hosted on various domains, indicative of a link farm or SEO poisoning attack. The ML classifier strongly flagged this PDF as malicious. The primary intent appears to be directing users to a network of potentially malicious or deceptive content through these numerous external links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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://foveroltd.com/uploads/1/3/0/7/130776564/130776564.html#k%C3%A1vovar+astoria+gloria+sae%2F2
    • http://entmktsolutions.com/uploads/1/3/0/2/130289553/691870.pdf
    • http://sportiv-expert.com/uploads/1/3/0/2/130289019/4949a665.pdf
    • http://angelstouchmobileps.com/uploads/1/3/0/6/130640225/seredod_subefo_tufidezuwet.pdf
    • http://newerakc.com/uploads/1/3/0/6/130603851/tutubuti.pdf
    • http://howesyourhome.com/uploads/1/3/0/7/130776363/57d6ea62.pdf
    • http://curiouskidspreschoolprogram.com/uploads/1/3/0/6/130621267/torokod.pdf
    • http://steinmanlab.com/uploads/1/3/0/3/130379428/pugovesatijoxeli.pdf
    • http://mattched.com/uploads/1/3/0/8/130873927/dezobazajefunef.pdf
    • http://particlemountain.com/uploads/1/3/0/4/130492315/doretasibukukotibotu.pdf
    • http://robinmagnet.com/uploads/1/3/0/6/130620603/pexutukimima.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_off00006b54.bin
c94a65f00f3d9480a316a146219483923f7dc7b95ec23f9dc04bbd998134bb88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B54 10448 bytes
font_01_sfnt_off00008ddd.bin
bb66d78edca8aa75a8db461931e44ad6eab12e4cd439df836d92d13c6ef6c22d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DDD 2668 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.