Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbeb01fb8565c52a…

MALICIOUS

PDF

48.2 KB Created: 2020-04-10 09:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: de7d130c7a844788226b9140b5d70a2a SHA-1: 109720afe20f94a98b03810531af13de2e2d808e SHA-256: cbeb01fb8565c52a5816b5d525064d7e543cba9968bc9af3dd029a1d7050624c
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged by an ML classifier as malicious. It contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The primary purpose appears to be directing users to these external sites, which could host further malicious content or be part of an SEO spam campaign. No scripts were extracted from this sample.

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://malolokids.com/uploads/1/3/0/6/130620543/130620543.html#cuestionarios+biblicos+para+ni%C3%B1os
    • http://aspirescuba.com/uploads/1/3/0/4/130435791/2119877.pdf
    • http://univetshop.com/uploads/1/3/1/0/131070702/580263.pdf
    • http://sstf.nl/uploads/1/3/0/7/130740244/a8ee1965300a7e.pdf
    • http://copperviewtucson.com/uploads/1/3/0/7/130775525/timokeweruzabinor.pdf
    • http://tv-internet-cells.com/uploads/1/3/0/6/130621626/5789761.pdf
    • http://210partners.com/uploads/1/3/0/4/130489131/bifamelodipiw.pdf
    • http://exaltmusicacademy.com/uploads/1/3/0/7/130739491/xunatef.pdf
    • http://thetowndoula.com/uploads/1/3/0/6/130605012/murebusuburi.pdf
    • http://dreamyvirginhairco.com/uploads/1/3/0/4/130476168/ccf2b67b4edb.pdf
    • http://momasol.com/uploads/1/3/0/6/130639665/3654215.pdf
    • http://phgultraryde.com/uploads/1/3/0/8/130874239/1000146.pdf
    • http://evanhc.com/uploads/1/3/1/3/131384536/4f6156e.pdf
    • http://sunshineresidencecleaners.com/uploads/1/3/0/3/130313243/xumiji-tewekuxuf-nemuk-lizekujapimuwix.pdf
    • http://natalieboden.com/uploads/1/3/0/8/130874676/tagukozubixowe-xavejir-gafol.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_off00008f69.bin
07d7e17d8c75ac410e79e7da09821c5f90f9caff8a155e5f3b589eb736b22537		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F69 9424 bytes

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