Malicious PDF — malware analysis report

Static analysis result for SHA-256 f14eacc07aef7a9d…

MALICIOUS

PDF

60.2 KB Created: 2020-05-04 09:38:46 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 12d618f6a7705b7120031eb5fc6b7a44 SHA-1: 06e4ccec93bbc46e74c06ffe28c3190e69996bbc SHA-256: f14eacc07aef7a9da291a7d1ea5d7987e2cd175b080f3d57636f8e37cdf8809b
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains a large number of external links, many of which point to PDF files hosted on various domains. The primary URL, http://offplandubai.properties/uploads/1/3/0/4/130483140/130483140.html#transformer+bushing+failure+rate, suggests a lure related to technical topics. The ML classifier strongly indicated maliciousness, and the heuristic firings confirm the presence of a link farm designed to distribute content, likely malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://offplandubai.properties/uploads/1/3/0/4/130483140/130483140.html#transformer+bushing+failure+rate
    • http://datalyx.co/uploads/1/3/1/4/131454158/loroli-zuwudumiwekev.pdf
    • http://sbsarchitects.co/uploads/1/3/0/2/130292089/bidej-sazoparofaxilap-ronubo.pdf
    • http://michaelmackail.com/uploads/1/3/0/4/130435682/361157723de48c5.pdf
    • http://renalhearthealth.com/uploads/1/3/0/6/130604165/demiduxokovel.pdf
    • http://healingsigns.org/uploads/1/3/1/1/131164272/7216204.pdf
    • http://cudp.com/uploads/1/3/1/4/131438819/5816162.pdf
    • http://idahofps.org/uploads/1/3/1/3/131398077/gimuzafujasimi_zejuzokox.pdf
    • http://stromberglab.com/uploads/1/3/1/4/131437660/6823d8ce0f.pdf
    • http://registerbc.nl/uploads/1/3/0/7/130739139/simezikisefeti.pdf
    • http://tamaraamidyart.com/uploads/1/3/0/2/130271048/5722824.pdf
    • http://richandjilldarby.com/uploads/1/3/0/6/130639025/zaxobofa-rojorizut-dakiwonawoni.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • 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_off0000bf3d.bin
a335e3b3bfe283ab158aaebc32ec098bd11247c494fd07c4401c4205c9128ee3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF3D 11256 bytes

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